{"id":36718,"date":"2025-07-29T23:15:26","date_gmt":"2025-07-29T16:15:26","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=36718"},"modified":"2025-07-30T22:36:38","modified_gmt":"2025-07-30T15:36:38","slug":"100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/","title":{"rendered":"100+ B\u00e0i t\u1eadp \u00f4n to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 v\u00e0 c\u00e1ch h\u1ecdc hi\u1ec7u qu\u1ea3"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#On_toan_lop_4_len_lop_5_can_hoc_nhung_kien_thuc_gi\" >\u00d4n to\u00e1n l\u1edbp\u00a0 4 l\u00ean l\u1edbp 5 c\u1ea7n h\u1ecdc nh\u1eefng ki\u1ebfn th\u1ee9c g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Tron_bo_bai_tap_toan_lop_4_len_lop_5_cung_be_on_luyen_tai_nha\" >Tr\u1ecdn b\u1ed9 b\u00e0i t\u1eadp to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 c\u00f9ng b\u00e9 \u00f4n luy\u1ec7n t\u1ea1i nh\u00e0<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Dang_bai_cau_tao_so_tu_nhien\" >D\u1ea1ng b\u00e0i c\u1ea5u t\u1ea1o s\u1ed1 t\u1ef1 nhi\u00ean<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_1_Xac_dinh_gia_tri_chu_so_theo_hang\" >B\u00e0i 1: X\u00e1c \u0111\u1ecbnh gi\u00e1 tr\u1ecb ch\u1eef s\u1ed1 theo h\u00e0ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_2_Phan_tich_so_thanh_tong_cac_gia_tri\" >B\u00e0i 2: Ph\u00e2n t\u00edch s\u1ed1 th\u00e0nh t\u1ed5ng c\u00e1c gi\u00e1 tr\u1ecb<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_3_Dien_so_theo_cau_tao\" >B\u00e0i 3: \u0110i\u1ec1n s\u1ed1 theo c\u1ea5u t\u1ea1o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_4_Tim_so_theo_dieu_kien\" >B\u00e0i 4: T\u00ecm s\u1ed1 theo \u0111i\u1ec1u ki\u1ec7n<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#2_Dang_bai_phan_so_va_so_thap_phan\" >2. D\u1ea1ng b\u00e0i ph\u00e2n s\u1ed1 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_1_Nhan_biet_va_doc_phan_so_so_thap_phan\" >B\u00e0i 1: Nh\u1eadn bi\u1ebft v\u00e0 \u0111\u1ecdc ph\u00e2n s\u1ed1, s\u1ed1 th\u1eadp ph\u00e2n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_2_So_sanh_phan_so_va_so_thap_phan\" >B\u00e0i 2: So s\u00e1nh ph\u00e2n s\u1ed1 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_3_Quy_dong_rut_gon_va_doi_giua_phan_so_va_so_thap_phan\" >B\u00e0i 3: Quy \u0111\u1ed3ng, r\u00fat g\u1ecdn v\u00e0 \u0111\u1ed5i gi\u1eefa ph\u00e2n s\u1ed1 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_4_Phep_tinh_voi_phan_so_va_so_thap_phan_co_ban\" >B\u00e0i 4: Ph\u00e9p t\u00ednh v\u1edbi ph\u00e2n s\u1ed1 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n (c\u01a1 b\u1ea3n)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_5_Giai_toan_co_loi_van_voi_phan_so_va_so_thap_phan\" >B\u00e0i 5: Gi\u1ea3i to\u00e1n c\u00f3 l\u1eddi v\u0103n v\u1edbi ph\u00e2n s\u1ed1 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#3_Bai_tap_toan_lop_4_len_lop_5_dang_trung_binh_cong\" >3. B\u00e0i t\u1eadp to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 d\u1ea1ng trung b\u00ecnh c\u1ed9ng<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_1_Tinh_trung_binh_cong_co_ban\" >B\u00e0i 1: T\u00ednh trung b\u00ecnh c\u1ed9ng (c\u01a1 b\u1ea3n)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_2_Tim_so_khi_biet_trung_binh_cong\" >B\u00e0i 2: T\u00ecm s\u1ed1 khi bi\u1ebft trung b\u00ecnh c\u1ed9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_3_Tim_so_con_thieu_trong_day_so\" >B\u00e0i 3: T\u00ecm s\u1ed1 c\u00f2n thi\u1ebfu trong d\u00e3y s\u1ed1<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_4_Bai_toan_co_loi_van_%E2%80%93_Trung_binh_cong\" >B\u00e0i 4: B\u00e0i to\u00e1n c\u00f3 l\u1eddi v\u0103n \u2013 Trung b\u00ecnh c\u1ed9ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#4_Dang_bai_tinh_kich_thuoc_hinh_hoc\" >4. D\u1ea1ng b\u00e0i t\u00ednh k\u00edch th\u01b0\u1edbc h\u00ecnh h\u1ecdc<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_1_Chu_vi_va_dien_tich_hinh_chu_nhat_hinh_vuong\" >B\u00e0i 1: Chu vi v\u00e0 di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt, h\u00ecnh vu\u00f4ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_2_Tinh_kich_thuoc_con_thieu\" >B\u00e0i 2: T\u00ednh k\u00edch th\u01b0\u1edbc c\u00f2n thi\u1ebfu<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_3_Bai_toan_co_loi_van\" >B\u00e0i 3: B\u00e0i to\u00e1n c\u00f3 l\u1eddi v\u0103n<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#5_Dang_bai_cac_dau_hieu_chia_het\" >5. D\u1ea1ng b\u00e0i c\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_1_Nhan_biet_dau_hieu_chia_het\" >B\u00e0i 1: Nh\u1eadn bi\u1ebft d\u1ea5u hi\u1ec7u chia h\u1ebft<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_2_Tim_so_thoa_man_dieu_kien_chia_het\" >B\u00e0i 2: T\u00ecm s\u1ed1 th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n chia h\u1ebft<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_3_Chon_dap_an_dung\" >B\u00e0i 3: Ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_4_Dung_hay_sai\" >B\u00e0i 4: \u0110\u00fang hay sai?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Bai_5_Bai_toan_co_loi_van\" >B\u00e0i 5: B\u00e0i to\u00e1n c\u00f3 l\u1eddi v\u0103n<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Cach_on_toan_lop_4_len_lop_5_cho_be_hieu_qua\" >C\u00e1ch \u00f4n to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 cho b\u00e9 hi\u1ec7u qu\u1ea3<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#On_lai_kien_thuc_lop_4_mot_cach_he_thong\" >\u00d4n l\u1ea1i ki\u1ebfn th\u1ee9c l\u1edbp 4 m\u1ed9t c\u00e1ch h\u1ec7 th\u1ed1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-31\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Chia_nho_noi_dung_va_hoc_theo_tung_dang_toan\" >Chia nh\u1ecf n\u1ed9i dung v\u00e0 h\u1ecdc theo t\u1eebng d\u1ea1ng to\u00e1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-32\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Ket_hop_ly_thuyet_voi_thuc_hanh_bai_tap\" >K\u1ebft h\u1ee3p l\u00fd thuy\u1ebft v\u1edbi th\u1ef1c h\u00e0nh b\u00e0i t\u1eadp<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-33\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Danh_thoi_gian_hoc_ngan_deu_dan\" >D\u00e0nh th\u1eddi gian h\u1ecdc ng\u1eafn, \u0111\u1ec1u \u0111\u1eb7n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-34\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Sua_loi_sai_chi_tiet_va_cung_co_lai_kien_thuc_bi_hong\" >S\u1eeda l\u1ed7i sai chi ti\u1ebft v\u00e0 c\u1ee7ng c\u1ed1 l\u1ea1i ki\u1ebfn th\u1ee9c b\u1ecb h\u1ed5ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-35\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Cho_hoc_sinh_luyen_de_tong_hop_sau_khi_da_on_xong_tung_dang\" >Cho h\u1ecdc sinh luy\u1ec7n \u0111\u1ec1 t\u1ed5ng h\u1ee3p sau khi \u0111\u00e3 \u00f4n xong t\u1eebng d\u1ea1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-36\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Tao_tam_ly_hoc_tich_cuc_khong_gay_ap_luc\" >T\u1ea1o t\u00e2m l\u00fd h\u1ecdc t\u00edch c\u1ef1c, kh\u00f4ng g\u00e2y \u00e1p l\u1ef1c<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-37\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Hoc_toan_lop_4_len_lop_5_hieu_qua_hon_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math_co_hoi_nhan_uu_dai_toi_50\" >H\u1ecdc to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 hi\u1ec7u qu\u1ea3 h\u01a1n c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math, c\u01a1 h\u1ed9i nh\u1eadn \u01b0u \u0111\u00e3i t\u1edbi 50%<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-38\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Toan_lop_4_len_lop_5_Ket_hop_hoc_tieng_Anh_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_de_phat_trien_toan_dien\" >To\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5: K\u1ebft h\u1ee3p h\u1ecdc ti\u1ebfng Anh c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef \u0111\u1ec3 ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-39\" href=\"https:\/\/www.ckconitsha.com\/vn\/100-bai-tap-on-toan-lop-4-len-lop-5-va-cach-hoc-hieu-qua\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>To\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 l\u00e0 giai \u0111o\u1ea1n quan tr\u1ecdng gi\u00fap h\u1ecdc sinh c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c v\u00e0 chu\u1ea9n b\u1ecb t\u1ed1t cho ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc m\u1edbi. V\u1edbi b\u1ed9 tr\u1ecdn b\u1ed9 b\u00e0i t\u1eadp to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 k\u00e8m theo ph\u01b0\u01a1ng ph\u00e1p \u00f4n luy\u1ec7n hi\u1ec7u qu\u1ea3 m\u00e0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef chia s\u1ebb sau \u0111\u00e2y, s\u1ebd g\u00f3p ph\u1ea7n ph\u1ee5 huynh v\u00e0 h\u1ecdc sinh s\u1ebd c\u00f3 th\u00eam t\u00e0i li\u1ec7u h\u1eefu \u00edch \u0111\u1ec3 r\u00e8n luy\u1ec7n t\u01b0 duy v\u00e0 n\u00e2ng cao k\u1ef9 n\u0103ng gi\u1ea3i to\u00e1n m\u1ed9t c\u00e1ch v\u1eefng ch\u1eafc.<\/p>\n<p>                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/image\/600x480_(1).png\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"On_toan_lop_4_len_lop_5_can_hoc_nhung_kien_thuc_gi\"><\/span>\u00d4n to\u00e1n l\u1edbp\u00a0 4 l\u00ean l\u1edbp 5 c\u1ea7n h\u1ecdc nh\u1eefng ki\u1ebfn th\u1ee9c g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Khi chuy\u1ec3n t\u1eeb l\u1edbp 4 l\u00ean l\u1edbp 5, h\u1ecdc sinh c\u1ea7n c\u00f3 n\u1ec1n t\u1ea3ng ki\u1ebfn th\u1ee9c v\u1eefng ch\u1eafc \u0111\u1ec3 ti\u1ebfp thu t\u1ed1t ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc m\u1edbi, v\u1ed1n c\u00f3 nhi\u1ec1u ki\u1ebfn th\u1ee9c n\u00e2ng cao h\u01a1n c\u1ea3 v\u1ec1 l\u00fd thuy\u1ebft l\u1eabn k\u1ef9 n\u0103ng gi\u1ea3i b\u00e0i. Vi\u1ec7c \u00f4n t\u1eadp \u0111\u00fang tr\u1ecdng t\u00e2m s\u1ebd gi\u00fap c\u00e1c em t\u1ef1 tin h\u01a1n khi b\u01b0\u1edbc v\u00e0o n\u0103m h\u1ecdc m\u1edbi. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng n\u1ed9i dung quan tr\u1ecdng c\u1ea7n \u00f4n luy\u1ec7n trong qu\u00e1 tr\u00ecnh h\u1ecdc to\u00e1n l\u1edbp 4 chu\u1ea9n b\u1ecb l\u00ean l\u1edbp 5:<\/p>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/storage_web\/12-09-2023_00:26:43_bi-quyet-hoc-gioi-toan-lop-5.jpg\" alt=\"Ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n l\u1edbp 4 chu\u1ea9n b\u1ecb l\u00ean l\u1edbp 5 c\u00f3 nhi\u1ec1u ki\u1ebfn th\u1ee9c b\u00e9 ph\u1ea3i \u00f4n (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">1. S\u1ed1 h\u1ecdc<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u1eafm v\u1eefng c\u00e1ch \u0111\u1ecdc, vi\u1ebft, so s\u00e1nh v\u00e0 s\u1eafp x\u1ebfp c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean \u0111\u1ebfn h\u00e0ng tri\u1ec7u trong to\u00e1n l\u1edbp 4.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Th\u1ef1c hi\u1ec7n th\u00e0nh th\u1ea1o c\u00e1c ph\u00e9p c\u1ed9ng, tr\u1eeb, nh\u00e2n, chia v\u1edbi s\u1ed1 c\u00f3 nhi\u1ec1u ch\u1eef s\u1ed1.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Bi\u1ebft nh\u00e2n, chia m\u1ed9t s\u1ed1 v\u1edbi 10, 100, 1000.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Hi\u1ec3u v\u00e0 \u00e1p d\u1ee5ng c\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft cho 2, 5, 9.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00d4n t\u1eadp v\u00e0 c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c v\u1ec1 ph\u00e2n s\u1ed1: r\u00fat g\u1ecdn, quy \u0111\u1ed3ng, so s\u00e1nh, c\u1ed9ng tr\u1eeb ph\u00e2n s\u1ed1.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">2. \u0110\u1ea1i l\u01b0\u1ee3ng v\u00e0 \u0111o l\u01b0\u1eddng<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00d4n l\u1ea1i c\u00e1ch \u0111\u1ed5i \u0111\u01a1n v\u1ecb \u0111o \u0111\u1ed9 d\u00e0i, kh\u1ed1i l\u01b0\u1ee3ng, di\u1ec7n t\u00edch v\u00e0 th\u1eddi gian.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh v\u1edbi s\u1ed1 \u0111o \u0111\u1ea1i l\u01b0\u1ee3ng, \u0111\u1eb7c bi\u1ec7t ch\u00fa tr\u1ecdng \u0111\u1ebfn vi\u1ec7c \u0111\u1ed5i \u0111\u01a1n v\u1ecb tr\u01b0\u1edbc khi t\u00ednh.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">3. H\u00ecnh h\u1ecdc<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Nh\u1eadn bi\u1ebft v\u00e0 t\u00ednh \u0111\u01b0\u1ee3c chu vi, di\u1ec7n t\u00edch c\u00e1c h\u00ecnh h\u1ecdc c\u01a1 b\u1ea3n nh\u01b0 h\u00ecnh vu\u00f4ng, h\u00ecnh ch\u1eef nh\u1eadt, tam gi\u00e1c.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">L\u00e0m quen v\u1edbi c\u00e1c h\u00ecnh m\u1edbi s\u1ebd g\u1eb7p trong to\u00e1n l\u1edbp 5 nh\u01b0 h\u00ecnh thoi, h\u00ecnh b\u00ecnh h\u00e0nh.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">4. Gi\u1ea3i to\u00e1n c\u00f3 l\u1eddi v\u0103n<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">R\u00e8n luy\u1ec7n k\u1ef9 n\u0103ng \u0111\u1ecdc hi\u1ec3u \u0111\u1ec1 b\u00e0i, x\u00e1c \u0111\u1ecbnh d\u1eef ki\u1ec7n v\u00e0 y\u00eau c\u1ea7u.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u00d4n c\u00e1c d\u1ea1ng to\u00e1n quen thu\u1ed9c nh\u01b0: t\u00ecm hai s\u1ed1 khi bi\u1ebft t\u1ed5ng v\u00e0 hi\u1ec7u, to\u00e1n r\u00fat v\u1ec1 \u0111\u01a1n v\u1ecb, trung b\u00ecnh c\u1ed9ng, to\u00e1n c\u00f3 y\u1ebfu t\u1ed1 h\u00ecnh h\u1ecdc, t\u1ef7 s\u1ed1.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">5. M\u1ed9t s\u1ed1 ki\u1ebfn th\u1ee9c m\u1edf r\u1ed9ng<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">L\u00e0m quen v\u1edbi bi\u1ec3u \u0111\u1ed3 \u0111\u01a1n gi\u1ea3n, b\u1ea3ng s\u1ed1 li\u1ec7u.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Th\u1eed s\u1ee9c v\u1edbi m\u1ed9t s\u1ed1 b\u00e0i to\u00e1n n\u00e2ng cao \u0111\u1ec3 ph\u00e1t tri\u1ec3n t\u01b0 duy logic v\u00e0 kh\u1ea3 n\u0103ng ph\u00e2n t\u00edch.<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tron_bo_bai_tap_toan_lop_4_len_lop_5_cung_be_on_luyen_tai_nha\"><\/span>Tr\u1ecdn b\u1ed9 b\u00e0i t\u1eadp to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 c\u00f9ng b\u00e9 \u00f4n luy\u1ec7n t\u1ea1i nh\u00e0<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 c\u00f3 s\u1ef1 chu\u1ea9n b\u1ecb t\u1ed1t khi h\u1ecdc to\u00e1n l\u1edbp 4 chu\u1ea9n b\u1ecb l\u00ean l\u1edbp 5, ba m\u1eb9 c\u00f3 th\u1ec3 c\u00f9ng con \u00f4n luy\u1ec7n c\u00e1c d\u1ea1ng to\u00e1n v\u00e0 b\u00e0i t\u1eadp sau \u0111\u00e2y:<\/p>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/toan-lop-4-hoc-nhung-gi-5.jpg\" alt=\"T\u1ed5ng h\u1ee3p c\u00e1c b\u00e0i t\u1eadp to\u00e1n l\u1edbp 4 chu\u1ea9n b\u1ecb l\u00ean l\u1edbp 5 \u0111\u1ec3 c\u00f9ng b\u00e9 \u00f4n t\u1eadp (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_bai_cau_tao_so_tu_nhien\"><\/span>D\u1ea1ng b\u00e0i c\u1ea5u t\u1ea1o s\u1ed1 t\u1ef1 nhi\u00ean<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">D\u1ea1ng to\u00e1n v\u1ec1 c\u1ea5u t\u1ea1o s\u1ed1 t\u1ef1 nhi\u00ean gi\u00fap h\u1ecdc sinh hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 gi\u00e1 tr\u1ecb c\u1ee7a t\u1eebng ch\u1eef s\u1ed1 trong s\u1ed1 c\u00f3 nhi\u1ec1u ch\u1eef s\u1ed1. Qua \u0111\u00f3, c\u00e1c em n\u1eafm v\u1eefng kh\u00e1i ni\u1ec7m gi\u00e1 tr\u1ecb ch\u1eef s\u1ed1, ch\u1eef s\u1ed1 h\u00e0ng \u0111\u01a1n v\u1ecb, ch\u1ee5c, tr\u0103m&#8230;, bi\u1ebft c\u00e1ch ph\u00e2n t\u00edch s\u1ed1 th\u00e0nh t\u1ed5ng c\u00e1c gi\u00e1 tr\u1ecb theo t\u1eebng h\u00e0ng, v\u00e0 t\u00ecm s\u1ed1 theo \u0111i\u1ec1u ki\u1ec7n cho tr\u01b0\u1edbc. \u0110\u00e2y l\u00e0 n\u1ec1n t\u1ea3ng quan tr\u1ecdng \u0111\u1ec3 h\u1ecdc t\u1ed1t ph\u1ea7n s\u1ed1 h\u1ecdc \u1edf l\u1edbp 5. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp c\u01a1 b\u1ea3n:<\/p>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_1_Xac_dinh_gia_tri_chu_so_theo_hang\"><\/span>B\u00e0i 1: X\u00e1c \u0111\u1ecbnh gi\u00e1 tr\u1ecb ch\u1eef s\u1ed1 theo h\u00e0ng<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong s\u1ed1 4\u202f735, ch\u1eef s\u1ed1 7 thu\u1ed9c h\u00e0ng n\u00e0o v\u00e0 c\u00f3 gi\u00e1 tr\u1ecb l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong s\u1ed1 60\u202f423, ch\u1eef s\u1ed1 6 c\u00f3 gi\u00e1 tr\u1ecb l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ch\u1eef s\u1ed1 2 trong s\u1ed1 28\u202f904 c\u00f3 gi\u00e1 tr\u1ecb l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong s\u1ed1 91\u202f208, ch\u1eef s\u1ed1 0 thu\u1ed9c h\u00e0ng n\u00e0o?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Gi\u00e1 tr\u1ecb c\u1ee7a ch\u1eef s\u1ed1 1 trong s\u1ed1 513\u202f067 l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong s\u1ed1 807\u202f032, ch\u1eef s\u1ed1 3 c\u00f3 gi\u00e1 tr\u1ecb l\u00e0?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ch\u1eef s\u1ed1 5 trong s\u1ed1 1\u202f523 c\u00f3 gi\u00e1 tr\u1ecb l\u00e0?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong s\u1ed1 340\u202f009, ch\u1eef s\u1ed1 0 xu\u1ea5t hi\u1ec7n m\u1ea5y l\u1ea7n v\u00e0 \u1edf nh\u1eefng h\u00e0ng n\u00e0o?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ch\u1eef s\u1ed1 9 trong 89\u202f612 c\u00f3 gi\u00e1 tr\u1ecb g\u00ec?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong s\u1ed1 1\u202f000\u202f001, ch\u1eef s\u1ed1 1 c\u00f3 gi\u00e1 tr\u1ecb l\u00e0?<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00e0ng tr\u0103m, gi\u00e1 tr\u1ecb 700<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Gi\u00e1 tr\u1ecb 60\u202f000<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Gi\u00e1 tr\u1ecb 20\u202f000<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00e0ng ch\u1ee5c, gi\u00e1 tr\u1ecb 0<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Gi\u00e1 tr\u1ecb 10\u202f000<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Gi\u00e1 tr\u1ecb 30<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Gi\u00e1 tr\u1ecb 500<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3 l\u1ea7n; h\u00e0ng ch\u1ee5c ngh\u00ecn, ngh\u00ecn, h\u00e0ng ch\u1ee5c<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Gi\u00e1 tr\u1ecb 9000<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Gi\u00e1 tr\u1ecb 1 (\u1edf h\u00e0ng tri\u1ec7u v\u00e0 h\u00e0ng \u0111\u01a1n v\u1ecb)<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_2_Phan_tich_so_thanh_tong_cac_gia_tri\"><\/span>B\u00e0i 2: Ph\u00e2n t\u00edch s\u1ed1 th\u00e0nh t\u1ed5ng c\u00e1c gi\u00e1 tr\u1ecb<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ph\u00e2n t\u00edch s\u1ed1 3\u202f245 th\u00e0nh t\u1ed5ng c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a t\u1eebng ch\u1eef s\u1ed1.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 50\u202f816 th\u00e0nh t\u1ed5ng c\u00e1c h\u00e0ng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ph\u00e2n t\u00edch 91\u202f002 theo c\u1ea5u t\u1ea1o s\u1ed1.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">74\u202f000 g\u1ed3m nh\u1eefng h\u00e0ng n\u00e0o?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 6\u202f073 \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ph\u00e2n t\u00edch 800\u202f609 th\u00e0nh t\u1ed5ng c\u00e1c gi\u00e1 tr\u1ecb.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 42\u202f010 theo c\u1ea5u t\u1ea1o.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft 300\u202f001 th\u00e0nh t\u1ed5ng c\u00e1c th\u00e0nh ph\u1ea7n theo gi\u00e1 tr\u1ecb ch\u1eef s\u1ed1.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ph\u00e2n t\u00edch 10\u202f005.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">901\u202f230 g\u1ed3m nh\u1eefng gi\u00e1 tr\u1ecb n\u00e0o?<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3000 + 200 + 40 + 5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">50\u202f000 + 800 + 10 + 6<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">90\u202f000 + 1\u202f000 + 2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">70\u202f000 + 4\u202f000<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">6\u202f000 + 70 + 3<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">800\u202f000 + 600 + 9<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">40\u202f000 + 2\u202f000 + 10<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">300\u202f000 + 1<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">10\u202f000 + 5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">900\u202f000 + 1\u202f000 + 200 + 30<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_3_Dien_so_theo_cau_tao\"><\/span>B\u00e0i 3: \u0110i\u1ec1n s\u1ed1 theo c\u1ea5u t\u1ea1o<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 c\u00f3 3 ngh\u00ecn, 2 tr\u0103m, 5 ch\u1ee5c v\u00e0 6 \u0111\u01a1n v\u1ecb.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 g\u1ed3m 7 tr\u0103m ngh\u00ecn, 4 ngh\u00ecn, 0 tr\u0103m, 2 ch\u1ee5c v\u00e0 1 \u0111\u01a1n v\u1ecb.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 g\u1ed3m 5 ch\u1ee5c ngh\u00ecn, 8 tr\u0103m v\u00e0 3 \u0111\u01a1n v\u1ecb l\u00e0?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 c\u00f3 c\u1ea5u t\u1ea1o: 200\u202f000 + 30\u202f000 + 4\u202f000 + 500 + 60 + 9<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 g\u1ed3m: 6 tr\u0103m ngh\u00ecn, 0 ch\u1ee5c ngh\u00ecn, 1 tr\u0103m, 9 \u0111\u01a1n v\u1ecb<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 g\u1ed3m: 9 \u0111\u01a1n v\u1ecb v\u00e0 3 ch\u1ee5c<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1: 80 ngh\u00ecn + 4 tr\u0103m + 20<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 c\u00f3 c\u1ea5u t\u1ea1o: 100\u202f000 + 2000 + 30<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 c\u00f3 2 ch\u1ee5c ngh\u00ecn, 7 ngh\u00ecn, 1 tr\u0103m, 5 ch\u1ee5c, 0 \u0111\u01a1n v\u1ecb<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 g\u1ed3m: 1 tri\u1ec7u, 0 tr\u0103m ngh\u00ecn, 2 ch\u1ee5c ngh\u00ecn<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3\u202f256<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">704\u202f021<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">50\u202f803<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">234\u202f569<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">600\u202f109<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">39<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">80\u202f420<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">102\u202f030<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">27\u202f150<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1\u202f020\u202f000<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_4_Tim_so_theo_dieu_kien\"><\/span>B\u00e0i 4: T\u00ecm s\u1ed1 theo \u0111i\u1ec1u ki\u1ec7n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1, ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m l\u00e0 4, h\u00e0ng ch\u1ee5c l\u00e0 0, h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 7.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 c\u00f3 4 ch\u1eef s\u1ed1, ch\u1eef s\u1ed1 h\u00e0ng ngh\u00ecn l\u00e0 6, t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0 15. T\u00ecm s\u1ed1 \u0111\u00f3.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 c\u00f3 5 ch\u1eef s\u1ed1, ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c ngh\u00ecn l\u00e0 2, c\u00e1c ch\u1eef s\u1ed1 c\u00f2n l\u1ea1i l\u00e0 s\u1ed1 0.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm s\u1ed1 c\u00f3 6 ch\u1eef s\u1ed1, ch\u1eef s\u1ed1 h\u00e0ng tri\u1ec7u l\u00e0 1, c\u00f2n l\u1ea1i l\u00e0 0.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng ngh\u00ecn l\u00e0 5, ch\u1eef s\u1ed1 h\u00e0ng ch\u1ee5c l\u00e0 7, c\u00f2n l\u1ea1i l\u00e0 0.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1, ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m g\u1ea5p 2 l\u1ea7n h\u00e0ng ch\u1ee5c, h\u00e0ng \u0111\u01a1n v\u1ecb l\u00e0 5.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t s\u1ed1 c\u00f3 4 ch\u1eef s\u1ed1, t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0 10, bi\u1ebft s\u1ed1 \u0111\u00f3 chia h\u1ebft cho 5.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm s\u1ed1 c\u00f3 5 ch\u1eef s\u1ed1, ch\u1eef s\u1ed1 \u0111\u1ea7u l\u00e0 9, ch\u1eef s\u1ed1 cu\u1ed1i l\u00e0 1, t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 b\u1eb1ng 20.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 c\u00f3 6 ch\u1eef s\u1ed1, g\u1ed3m 3 s\u1ed1 1 v\u00e0 3 s\u1ed1 0.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 c\u00f3 3 ch\u1eef s\u1ed1 sao cho t\u1ed5ng l\u00e0 6 v\u00e0 kh\u00f4ng c\u00f3 ch\u1eef s\u1ed1 n\u00e0o gi\u1ed1ng nhau.<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">407<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">6\u202f258<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">20\u202f000<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1\u202f000\u202f000<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">5\u202f070<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">421 ho\u1eb7c 842 (tu\u1ef3 \u0111i\u1ec1u ki\u1ec7n)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1\u202f405<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">9\u202f5412 ho\u1eb7c 9\u202f4321\u2026 (nhi\u1ec1u \u0111\u00e1p \u00e1n th\u1ecfa m\u00e3n)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">101\u202f100, 110\u202f010, 100\u202f110,\u2026<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">123, 132, 312,\u2026 (c\u00e1c s\u1ed1 c\u00f3 t\u1ed5ng 6 v\u00e0 ch\u1eef s\u1ed1 kh\u00e1c nhau)<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"2_Dang_bai_phan_so_va_so_thap_phan\"><\/span>2. D\u1ea1ng b\u00e0i ph\u00e2n s\u1ed1 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trong giai \u0111o\u1ea1n \u00f4n t\u1eeb l\u1edbp 4 l\u00ean l\u1edbp 5, ph\u00e2n s\u1ed1 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n l\u00e0 m\u1ed9t trong nh\u1eefng n\u1ed9i dung c\u1ed1t l\u00f5i. H\u1ecdc sinh c\u1ea7n hi\u1ec3u \u0111\u01b0\u1ee3c b\u1ea3n ch\u1ea5t c\u1ee7a ph\u00e2n s\u1ed1 (t\u1eed s\u1ed1, m\u1eabu s\u1ed1), c\u00e1ch r\u00fat g\u1ecdn, quy \u0111\u1ed3ng, so s\u00e1nh v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c ph\u00e9p c\u1ed9ng, tr\u1eeb c\u01a1 b\u1ea3n. \u0110\u1ed3ng th\u1eddi, vi\u1ec7c l\u00e0m quen v\u1edbi s\u1ed1 th\u1eadp ph\u00e2n, c\u00e1ch \u0111\u1ecdc, vi\u1ebft, \u0111\u1ed5i \u0111\u01a1n v\u1ecb v\u00e0 so s\u00e1nh s\u1ebd l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 h\u1ecdc sinh ti\u1ebfp c\u1eadn t\u1ed1t ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n l\u1edbp 5.<\/p>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_1_Nhan_biet_va_doc_phan_so_so_thap_phan\"><\/span>B\u00e0i 1: Nh\u1eadn bi\u1ebft v\u00e0 \u0111\u1ecdc ph\u00e2n s\u1ed1, s\u1ed1 th\u1eadp ph\u00e2n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft ph\u00e2n s\u1ed1 bi\u1ec3u th\u1ecb 5 ph\u1ea7n trong t\u1ed5ng 8 ph\u1ea7n.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ecdc ph\u00e2n s\u1ed1: 7\/10<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 th\u1eadp ph\u00e2n t\u01b0\u01a1ng \u1ee9ng v\u1edbi ph\u00e2n s\u1ed1: 3\/10<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 th\u1eadp ph\u00e2n c\u00f3 ba ph\u1ea7n m\u01b0\u1eddi.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft ph\u00e2n s\u1ed1 bi\u1ec3u di\u1ec5n: 0,5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft ph\u00e2n s\u1ed1 bi\u1ec3u di\u1ec5n: 0,25<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 0,1 \u0111\u01b0\u1ee3c \u0111\u1ecdc l\u00e0 g\u00ec?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 th\u1eadp ph\u00e2n c\u00f3 b\u1ed1n ph\u1ea7n tr\u0103m.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 th\u1eadp ph\u00e2n: ba ph\u1ea7n m\u01b0\u1eddi hai.<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">5\/8<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u1ea3y ph\u1ea7n m\u01b0\u1eddi<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,3<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,3<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1\/2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1\/4<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t ph\u1ea7n m\u01b0\u1eddi<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,04<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3\/12 ho\u1eb7c 0,25 (n\u1ebfu r\u00fat g\u1ecdn)<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_2_So_sanh_phan_so_va_so_thap_phan\"><\/span>B\u00e0i 2: So s\u00e1nh ph\u00e2n s\u1ed1 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">So s\u00e1nh: 2\/5 \u2026 3\/5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">So s\u00e1nh: 0,4 \u2026 0,7<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 n\u00e0o l\u1edbn h\u01a1n: 1\/2 hay 0,6?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110i\u1ec1n d\u1ea5u th\u00edch h\u1ee3p: 3\/10 \u2026 0,25<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1eafp x\u1ebfp c\u00e1c s\u1ed1 theo th\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n: 1\/3; 0,3; 2\/5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">So s\u00e1nh: 5\/10 \u2026 0,5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 nh\u1ecf nh\u1ea5t: 0,75; 3\/4; 0,7<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft d\u1ea5u &gt;, &lt;, = v\u00e0o: 0,25 \u2026 1\/4<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">So s\u00e1nh: 7\/10 v\u00e0 0,9<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1eafp x\u1ebfp: 1\/5; 0,2; 0,25<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">2\/5 &lt; 3\/5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,4 &lt; 0,7<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,6 &gt; 1\/2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3\/10 &gt; 0,25<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,3; 1\/3; 2\/5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">=<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,7<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">=<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">7\/10 &lt; 0,9<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1\/5 = 0,2 &lt; 0,25<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_3_Quy_dong_rut_gon_va_doi_giua_phan_so_va_so_thap_phan\"><\/span>B\u00e0i 3: Quy \u0111\u1ed3ng, r\u00fat g\u1ecdn v\u00e0 \u0111\u1ed5i gi\u1eefa ph\u00e2n s\u1ed1 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">R\u00fat g\u1ecdn ph\u00e2n s\u1ed1 6\/9.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">R\u00fat g\u1ecdn: 15\/25<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft 0,75 d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft 3\/4 d\u01b0\u1edbi d\u1ea1ng s\u1ed1 th\u1eadp ph\u00e2n.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Quy \u0111\u1ed3ng m\u1eabu s\u1ed1: 2\/5 v\u00e0 3\/10<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft 1,25 d\u01b0\u1edbi d\u1ea1ng ph\u00e2n s\u1ed1.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ed5i: 1\/10 = ? (s\u1ed1 th\u1eadp ph\u00e2n)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 th\u1eadp ph\u00e2n th\u00e0nh ph\u00e2n s\u1ed1: 0,6<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">R\u00fat g\u1ecdn ph\u00e2n s\u1ed1: 24\/36<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft s\u1ed1 th\u1eadp ph\u00e2n th\u00e0nh h\u1ed7n s\u1ed1: 1,5<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">2\/3<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3\/5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3\/4<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,75<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">2\/5 = 4\/10; 3\/10 gi\u1eef nguy\u00ean<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">5\/4<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,1<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3\/5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">2\/3<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1 1\/2<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_4_Phep_tinh_voi_phan_so_va_so_thap_phan_co_ban\"><\/span>B\u00e0i 4: Ph\u00e9p t\u00ednh v\u1edbi ph\u00e2n s\u1ed1 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n (c\u01a1 b\u1ea3n)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1\/2 + 1\/2 = ?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3\/10 + 2\/10 = ?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">5\/6 \u2013 1\/6 = ?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,3 + 0,2 = ?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,9 \u2013 0,4 = ?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh: 0,5 + 0,25<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3\/4 \u2013 1\/4 = ?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,6 + 0,1 = ?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">7\/10 \u2013 3\/10 = ?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,8 \u2013 0,3 = ?<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">5\/10 = 1\/2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">4\/6 = 2\/3<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,75<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">2\/4 = 1\/2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,7<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">4\/10 = 2\/5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,5<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_5_Giai_toan_co_loi_van_voi_phan_so_va_so_thap_phan\"><\/span>B\u00e0i 5: Gi\u1ea3i to\u00e1n c\u00f3 l\u1eddi v\u0103n v\u1edbi ph\u00e2n s\u1ed1 v\u00e0 s\u1ed1 th\u1eadp ph\u00e2n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Lan \u0103n 2\/5 chi\u1ebfc b\u00e1nh, Nam \u0103n 1\/5. H\u1ecfi c\u1ea3 hai \u0103n bao nhi\u00eau ph\u1ea7n b\u00e1nh?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t b\u1ed3n n\u01b0\u1edbc ch\u1ee9a 0,75 l\u00edt. R\u00f3t ra 0,25 l\u00edt. H\u1ecfi c\u00f2n l\u1ea1i bao nhi\u00eau l\u00edt?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t th\u1eeda ru\u1ed9ng \u0111\u00e3 c\u1ea5y 3\/4 di\u1ec7n t\u00edch. H\u1ecfi c\u00f2n l\u1ea1i bao nhi\u00eau ph\u1ea7n ch\u01b0a c\u1ea5y?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t \u0111o\u1ea1n d\u00e2y d\u00e0i 1m. C\u1eaft \u0111i 0,4m. \u0110o\u1ea1n c\u00f2n l\u1ea1i d\u00e0i bao nhi\u00eau m\u00e9t?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong l\u1edbp c\u00f3 30 h\u1ecdc sinh, 2\/5 l\u00e0 h\u1ecdc sinh n\u1eef. H\u1ecfi c\u00f3 bao nhi\u00eau h\u1ecdc sinh n\u1eef?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t b\u00ecnh n\u01b0\u1edbc c\u00f3 1,5 l\u00edt. D\u00f9ng h\u1ebft 0,75 l\u00edt. C\u00f2n l\u1ea1i bao nhi\u00eau l\u00edt?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t ng\u01b0\u1eddi \u0111i b\u1ed9 m\u1ed7i gi\u1edd 0,8 km. H\u1ecfi 3 gi\u1edd ng\u01b0\u1eddi \u0111\u00f3 \u0111i \u0111\u01b0\u1ee3c bao nhi\u00eau km?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t \u0111o\u1ea1n th\u1eb3ng \u0111\u01b0\u1ee3c chia l\u00e0m 10 ph\u1ea7n b\u1eb1ng nhau, t\u00f4 m\u00e0u 3 ph\u1ea7n. H\u1ecfi \u0111\u00e3 t\u00f4 bao nhi\u00eau ph\u1ea7n tr\u0103m?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t t\u1ea5m b\u00eca c\u00f3 di\u1ec7n t\u00edch 1m\u00b2. S\u01a1n m\u00e0u xanh 0,6m\u00b2. H\u1ecfi di\u1ec7n t\u00edch ch\u01b0a s\u01a1n l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t c\u1eeda h\u00e0ng b\u00e1n \u0111\u01b0\u1ee3c 0,25 t\u1ea5n g\u1ea1o trong bu\u1ed5i s\u00e1ng v\u00e0 0,5 t\u1ea5n v\u00e0o bu\u1ed5i chi\u1ec1u. C\u1ea3 ng\u00e0y b\u00e1n \u0111\u01b0\u1ee3c bao nhi\u00eau t\u1ea5n?<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3\/5 chi\u1ebfc b\u00e1nh<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,75 \u2013 0,25 = 0,5 l\u00edt<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1 \u2013 3\/4 = 1\/4 di\u1ec7n t\u00edch<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1 \u2013 0,4 = 0,6m<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">30 \u00d7 2\/5 = 12 h\u1ecdc sinh<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1,5 \u2013 0,75 = 0,75 l\u00edt<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,8 \u00d7 3 = 2,4 km<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">30%<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1 \u2013 0,6 = 0,4 m\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">0,25 + 0,5 = 0,75 t\u1ea5n<\/p>\n<\/li>\n<\/ol>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"3_Bai_tap_toan_lop_4_len_lop_5_dang_trung_binh_cong\"><\/span>3. B\u00e0i t\u1eadp to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 d\u1ea1ng trung b\u00ecnh c\u1ed9ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">To\u00e1n trung b\u00ecnh c\u1ed9ng l\u00e0 d\u1ea1ng b\u00e0i gi\u00fap h\u1ecdc sinh r\u00e8n luy\u1ec7n kh\u1ea3 n\u0103ng t\u00ednh to\u00e1n, suy lu\u1eadn logic v\u00e0 gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 th\u1ef1c t\u1ebf. Trong giai \u0111o\u1ea1n chuy\u1ec3n ti\u1ebfp t\u1eeb l\u1edbp 4 l\u00ean l\u1edbp 5, h\u1ecdc sinh c\u1ea7n n\u1eafm ch\u1eafc c\u00e1ch t\u00ednh trung b\u00ecnh c\u1ed9ng c\u1ee7a nhi\u1ec1u s\u1ed1, hi\u1ec3u \u00fd ngh\u0129a th\u1ef1c t\u1ebf c\u1ee7a k\u1ebft qu\u1ea3, v\u00e0 \u00e1p d\u1ee5ng v\u00e0o c\u00e1c b\u00e0i to\u00e1n c\u00f3 l\u1eddi v\u0103n.<\/p>\n<p dir=\"ltr\">C\u00f4ng th\u1ee9c c\u01a1 b\u1ea3n: Trung b\u00ecnh c\u1ed9ng = T\u1ed5ng c\u00e1c s\u1ed1 \/ S\u1ed1 l\u01b0\u1ee3ng s\u1ed1<\/p>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_1_Tinh_trung_binh_cong_co_ban\"><\/span>B\u00e0i 1: T\u00ednh trung b\u00ecnh c\u1ed9ng (c\u01a1 b\u1ea3n)<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh trung b\u00ecnh c\u1ed9ng c\u1ee7a 4 v\u00e0 6.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh trung b\u00ecnh c\u1ed9ng c\u1ee7a 8; 10 v\u00e0 12.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trung b\u00ecnh c\u1ed9ng c\u1ee7a 15; 20 v\u00e0 25 l\u00e0?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm trung b\u00ecnh c\u1ed9ng c\u1ee7a 3 s\u1ed1: 100; 200; 300.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trung b\u00ecnh c\u1ed9ng c\u1ee7a 5; 10; 15; 20 l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh trung b\u00ecnh c\u1ed9ng c\u1ee7a 2; 4; 6; 8; 10.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh trung b\u00ecnh c\u1ed9ng c\u1ee7a 40 v\u00e0 60.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh trung b\u00ecnh c\u1ed9ng c\u1ee7a 81; 87; 93.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trung b\u00ecnh c\u1ed9ng c\u1ee7a 7 s\u1ed1 \u0111\u1ec1u b\u1eb1ng 10 l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trung b\u00ecnh c\u1ed9ng c\u1ee7a 25 v\u00e0 35 l\u00e0?<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(4 + 6) \u00f7 2 = 5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(8 + 10 + 12) \u00f7 3 = 10<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(15 + 20 + 25) \u00f7 3 = 20<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(100 + 200 + 300) \u00f7 3 = 200<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(5 + 10 + 15 + 20) \u00f7 4 = 12,5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(2 + 4 + 6 + 8 + 10) \u00f7 5 = 6<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(40 + 60) \u00f7 2 = 50<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(81 + 87 + 93) \u00f7 3 = 87<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">10<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(25 + 35) \u00f7 2 = 30<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_2_Tim_so_khi_biet_trung_binh_cong\"><\/span>B\u00e0i 2: T\u00ecm s\u1ed1 khi bi\u1ebft trung b\u00ecnh c\u1ed9ng<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ba s\u1ed1 c\u00f3 trung b\u00ecnh c\u1ed9ng l\u00e0 6. T\u1ed5ng c\u1ee7a ba s\u1ed1 l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trung b\u00ecnh c\u1ed9ng c\u1ee7a hai s\u1ed1 l\u00e0 18. T\u1ed5ng hai s\u1ed1 b\u1eb1ng bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm t\u1ed5ng c\u1ee7a 5 s\u1ed1 c\u00f3 trung b\u00ecnh c\u1ed9ng l\u00e0 10.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t nh\u00f3m c\u00f3 4 h\u1ecdc sinh, \u0111i\u1ec3m trung b\u00ecnh l\u00e0 8. T\u1ed5ng \u0111i\u1ec3m c\u1ea3 nh\u00f3m l\u00e0?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Hai s\u1ed1 c\u00f3 t\u1ed5ng b\u1eb1ng 60. Trung b\u00ecnh c\u1ed9ng c\u1ee7a hai s\u1ed1 l\u00e0?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u1ed1n s\u1ed1 c\u00f3 t\u1ed5ng b\u1eb1ng 48. Trung b\u00ecnh c\u1ed9ng l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm t\u1ed5ng c\u1ee7a 6 s\u1ed1 c\u00f3 trung b\u00ecnh c\u1ed9ng l\u00e0 12.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t h\u1ecdc sinh l\u00e0m 3 b\u00e0i ki\u1ec3m tra, \u0111i\u1ec3m trung b\u00ecnh l\u00e0 9. T\u1ed5ng \u0111i\u1ec3m 3 b\u00e0i l\u00e0?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trung b\u00ecnh c\u1ed9ng c\u1ee7a 2 s\u1ed1 l\u00e0 13, t\u1ed5ng l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">5 s\u1ed1 c\u00f3 t\u1ed5ng l\u00e0 75. Trung b\u00ecnh c\u1ed9ng l\u00e0?<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">6 \u00d7 3 = 18<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">18 \u00d7 2 = 36<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">10 \u00d7 5 = 50<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">8 \u00d7 4 = 32<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">60 \u00f7 2 = 30<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">48 \u00f7 4 = 12<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">12 \u00d7 6 = 72<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">9 \u00d7 3 = 27<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">13 \u00d7 2 = 26<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">75 \u00f7 5 = 15<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_3_Tim_so_con_thieu_trong_day_so\"><\/span>B\u00e0i 3: T\u00ecm s\u1ed1 c\u00f2n thi\u1ebfu trong d\u00e3y s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ba s\u1ed1 c\u00f3 trung b\u00ecnh c\u1ed9ng l\u00e0 12. Bi\u1ebft hai s\u1ed1 \u0111\u1ea7u l\u00e0 10 v\u00e0 14. T\u00ecm s\u1ed1 th\u1ee9 ba.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trung b\u00ecnh c\u1ed9ng c\u1ee7a 4 s\u1ed1 l\u00e0 9. Bi\u1ebft ba s\u1ed1 \u0111\u1ea7u l\u00e0 8; 9; 10. T\u00ecm s\u1ed1 th\u1ee9 t\u01b0.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u1ed1n s\u1ed1 c\u00f3 t\u1ed5ng l\u00e0 100. Bi\u1ebft ba s\u1ed1 \u0111\u1ea7u l\u00e0 20; 25; 30. T\u00ecm s\u1ed1 c\u00f2n l\u1ea1i.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u0103m s\u1ed1 c\u00f3 trung b\u00ecnh c\u1ed9ng l\u00e0 6. Bi\u1ebft b\u1ed1n s\u1ed1 l\u00e0 5; 6; 7; 8. T\u00ecm s\u1ed1 c\u00f2n thi\u1ebfu.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ba s\u1ed1 c\u00f3 t\u1ed5ng l\u00e0 60. Bi\u1ebft hai s\u1ed1 \u0111\u1ea7u l\u00e0 20 v\u00e0 15. T\u00ecm s\u1ed1 th\u1ee9 ba.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm s\u1ed1 th\u1ee9 t\u01b0 bi\u1ebft ba s\u1ed1 \u0111\u1ea7u l\u00e0 11; 12; 13 v\u00e0 trung b\u00ecnh c\u1ed9ng c\u1ee7a 4 s\u1ed1 l\u00e0 12.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t h\u1ecdc sinh c\u00f3 4 b\u00e0i ki\u1ec3m tra: 9; 10; 8; v\u00e0 ch\u01b0a bi\u1ebft \u0111i\u1ec3m b\u00e0i cu\u1ed1i. Trung b\u00ecnh c\u1ea3 5 b\u00e0i l\u00e0 9. \u0110i\u1ec3m b\u00e0i cu\u1ed1i l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trung b\u00ecnh c\u1ed9ng 3 s\u1ed1 l\u00e0 30. Hai s\u1ed1 \u0111\u1ea7u l\u00e0 25 v\u00e0 35. S\u1ed1 th\u1ee9 ba l\u00e0?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ba s\u1ed1 c\u00f3 trung b\u00ecnh c\u1ed9ng l\u00e0 20. Hai s\u1ed1 \u0111\u1ea7u l\u00e0 15 v\u00e0 20. T\u00ecm s\u1ed1 th\u1ee9 ba.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trung b\u00ecnh c\u1ed9ng c\u1ee7a 5 s\u1ed1 l\u00e0 14. Bi\u1ebft b\u1ed1n s\u1ed1 l\u00e0 10; 12; 16; 18. T\u00ecm s\u1ed1 c\u00f2n l\u1ea1i.<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(12 \u00d7 3) \u2013 10 \u2013 14 = 36 \u2013 24 = 12<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">9 \u00d7 4 \u2013 (8 + 9 + 10) = 36 \u2013 27 = 9<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">100 \u2013 (20 + 25 + 30) = 100 \u2013 75 = 25<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">6 \u00d7 5 \u2013 (5 + 6 + 7 + 8) = 30 \u2013 26 = 4<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">60 \u2013 20 \u2013 15 = 25<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">12 \u00d7 4 \u2013 (11 + 12 + 13) = 48 \u2013 36 = 12<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">9 \u00d7 5 \u2013 (9 + 10 + 8 + ?) = 45 \u2013 27 = 18 \u2192 \u0111i\u1ec3m c\u00f2n l\u1ea1i l\u00e0 18<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">30 \u00d7 3 \u2013 25 \u2013 35 = 90 \u2013 60 = 30<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">20 \u00d7 3 \u2013 15 \u2013 20 = 60 \u2013 35 = 25<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">14 \u00d7 5 \u2013 (10 + 12 + 16 + 18) = 70 \u2013 56 = 14<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_4_Bai_toan_co_loi_van_%E2%80%93_Trung_binh_cong\"><\/span>B\u00e0i 4: B\u00e0i to\u00e1n c\u00f3 l\u1eddi v\u0103n \u2013 Trung b\u00ecnh c\u1ed9ng<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong ba ng\u00e0y, c\u1eeda h\u00e0ng b\u00e1n \u0111\u01b0\u1ee3c l\u1ea7n l\u01b0\u1ee3t 120; 150 v\u00e0 180 s\u1ea3n ph\u1ea9m. T\u00ednh s\u1ed1 s\u1ea3n ph\u1ea9m b\u00e1n trung b\u00ecnh m\u1ed7i ng\u00e0y.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ba h\u1ecdc sinh \u0111\u1ea1t \u0111i\u1ec3m ki\u1ec3m tra l\u00e0 9; 8 v\u00e0 10. T\u00ednh \u0111i\u1ec3m trung b\u00ecnh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t ng\u01b0\u1eddi \u0111i \u0111\u01b0\u1ee3c 40km ng\u00e0y th\u1ee9 nh\u1ea5t, 60km ng\u00e0y th\u1ee9 hai. Trung b\u00ecnh m\u1ed7i ng\u00e0y ng\u01b0\u1eddi \u0111\u00f3 \u0111i bao nhi\u00eau km?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong tu\u1ea7n, nhi\u1ec7t \u0111\u1ed9 trung b\u00ecnh 5 ng\u00e0y \u0111\u1ea7u l\u00e0 27\u00b0C. T\u1ed5ng nhi\u1ec7t \u0111\u1ed9 5 ng\u00e0y \u0111\u00f3 l\u00e0 bao nhi\u00eau?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t h\u1ecdc sinh l\u00e0m 4 b\u00e0i ki\u1ec3m tra: 7; 8; 9 v\u00e0 x \u0111i\u1ec3m. Trung b\u00ecnh l\u00e0 8 \u0111i\u1ec3m. T\u00ecm x.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u1ed5ng s\u1ed1 \u0111i\u1ec3m c\u1ee7a 4 h\u1ecdc sinh l\u00e0 36. T\u00ednh \u0111i\u1ec3m trung b\u00ecnh m\u1ed7i h\u1ecdc sinh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ba b\u1ea1n c\u00f3 trung b\u00ecnh 48 vi\u00ean bi. T\u1ed5ng s\u1ed1 bi c\u1ee7a ba b\u1ea1n l\u00e0?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u1ed5ng chi\u1ec1u cao c\u1ee7a 5 h\u1ecdc sinh l\u00e0 750cm. T\u00ednh chi\u1ec1u cao trung b\u00ecnh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u1ed1n b\u1ea1n c\u00f3 s\u1ed1 k\u1eb9o l\u1ea7n l\u01b0\u1ee3t l\u00e0 10; 12; 14; x. Bi\u1ebft trung b\u00ecnh l\u00e0 13. T\u00ecm x.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t h\u1ecdc sinh \u0111\u1ea1t c\u00e1c \u0111i\u1ec3m: 6, 7, 8. \u0110i\u1ec3m b\u00e0i th\u1ee9 t\u01b0 l\u00e0 bao nhi\u00eau \u0111\u1ec3 trung b\u00ecnh \u0111\u1ea1t 8?<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(120 + 150 + 180) \u00f7 3 = 450 \u00f7 3 = 150 s\u1ea3n ph\u1ea9m<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(9 + 8 + 10) \u00f7 3 = 27 \u00f7 3 = 9<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(40 + 60) \u00f7 2 = 50km<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">27 \u00d7 5 = 135\u00b0C<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(7 + 8 + 9 + x) \u00f7 4 = 8 \u2192 x = 8<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">36 \u00f7 4 = 9<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">48 \u00d7 3 = 144 vi\u00ean<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">750 \u00f7 5 = 150cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(10 + 12 + 14 + x) \u00f7 4 = 13 \u2192 x = 16<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(6 + 7 + 8 + x) \u00f7 4 = 8 \u2192 x = 11\u00a0<\/p>\n<\/li>\n<\/ol>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"4_Dang_bai_tinh_kich_thuoc_hinh_hoc\"><\/span>4. D\u1ea1ng b\u00e0i t\u00ednh k\u00edch th\u01b0\u1edbc h\u00ecnh h\u1ecdc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">D\u1ea1ng to\u00e1n \u00f4n l\u1edbp 4 l\u00ean l\u1edbp 5 n\u00e0y gi\u00fap h\u1ecdc sinh r\u00e8n luy\u1ec7n t\u01b0 duy v\u1ec1 kh\u00f4ng gian v\u00e0 h\u00ecnh h\u1ecdc c\u01a1 b\u1ea3n, bao g\u1ed3m c\u00e1c b\u00e0i to\u00e1n t\u00ednh chu vi, di\u1ec7n t\u00edch, \u0111\u1ed9 d\u00e0i c\u1ea1nh, chi\u1ec1u cao\u2026 c\u1ee7a c\u00e1c h\u00ecnh nh\u01b0 h\u00ecnh vu\u00f4ng, h\u00ecnh ch\u1eef nh\u1eadt, tam gi\u00e1c, h\u00ecnh b\u00ecnh h\u00e0nh, h\u00ecnh thoi.<\/p>\n<p dir=\"ltr\">Trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n l\u1edbp 4 v\u00e0 5, h\u1ecdc sinh c\u1ea7n n\u1eafm v\u1eefng c\u00e1c c\u00f4ng th\u1ee9c, hi\u1ec3u m\u1ed1i li\u00ean h\u1ec7 gi\u1eefa c\u00e1c k\u00edch th\u01b0\u1edbc v\u00e0 v\u1eadn d\u1ee5ng linh ho\u1ea1t trong c\u00e1c b\u00e0i to\u00e1n c\u00f3 l\u1eddi v\u0103n. N\u00ean d\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp \u0111\u1ec3 c\u00e1c em \u00e1p d\u1ee5ng:<\/p>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_1_Chu_vi_va_dien_tich_hinh_chu_nhat_hinh_vuong\"><\/span>B\u00e0i 1: Chu vi v\u00e0 di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt, h\u00ecnh vu\u00f4ng<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh chu vi h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 8cm, chi\u1ec1u r\u1ed9ng 5cm.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 10m, chi\u1ec1u r\u1ed9ng 4m.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh chu vi h\u00ecnh vu\u00f4ng c\u1ea1nh 6cm.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng c\u1ea1nh 9dm.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 15cm, chi\u1ec1u r\u1ed9ng b\u1eb1ng 1\/3 chi\u1ec1u d\u00e0i. T\u00ednh chu vi.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t h\u00ecnh vu\u00f4ng c\u00f3 di\u1ec7n t\u00edch 49cm\u00b2. T\u00ednh chu vi h\u00ecnh vu\u00f4ng \u0111\u00f3.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chu vi 32cm, chi\u1ec1u r\u1ed9ng 6cm. T\u00ednh chi\u1ec1u d\u00e0i.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chu vi 36cm, chi\u1ec1u r\u1ed9ng 6cm.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh vu\u00f4ng c\u00f3 chu vi 24cm. T\u00ednh di\u1ec7n t\u00edch.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ednh chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 di\u1ec7n t\u00edch 72cm\u00b2, chi\u1ec1u d\u00e0i 12cm.<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(8 + 5) \u00d7 2 = 26cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">10 \u00d7 4 = 40m\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">6 \u00d7 4 = 24cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">9 \u00d7 9 = 81dm\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Chi\u1ec1u r\u1ed9ng = 15 \u00f7 3 = 5cm \u2192 Chu vi = (15 + 5) \u00d7 2 = 40cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u1ea1nh = \u221a49 = 7cm \u2192 Chu vi = 7 \u00d7 4 = 28cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(32 \u00f7 2) \u2013 6 = 10cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(36 \u00f7 2) = 18 \u2192 Chi\u1ec1u d\u00e0i = 18 \u2013 6 = 12cm \u2192 Di\u1ec7n t\u00edch = 12 \u00d7 6 = 72cm\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u1ea1nh = 24 \u00f7 4 = 6cm \u2192 Di\u1ec7n t\u00edch = 6 \u00d7 6 = 36cm\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">72 \u00f7 12 = 6cm<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_2_Tinh_kich_thuoc_con_thieu\"><\/span>B\u00e0i 2: T\u00ednh k\u00edch th\u01b0\u1edbc c\u00f2n thi\u1ebfu<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 48cm\u00b2, chi\u1ec1u d\u00e0i l\u00e0 8cm. T\u00ednh chi\u1ec1u r\u1ed9ng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh vu\u00f4ng c\u00f3 di\u1ec7n t\u00edch 64cm\u00b2. T\u00ednh \u0111\u1ed9 d\u00e0i 1 c\u1ea1nh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Chu vi h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 50cm, chi\u1ec1u d\u00e0i l\u00e0 15cm. T\u00ecm chi\u1ec1u r\u1ed9ng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh vu\u00f4ng c\u00f3 chu vi 36cm. T\u00ednh c\u1ea1nh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh ch\u1eef nh\u1eadt c\u00f3 di\u1ec7n t\u00edch 56cm\u00b2, chi\u1ec1u r\u1ed9ng 7cm. T\u00ednh chi\u1ec1u d\u00e0i.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Chu vi h\u00ecnh vu\u00f4ng l\u00e0 20cm. T\u00ecm c\u1ea1nh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt l\u00e0 99m\u00b2, chi\u1ec1u d\u00e0i l\u00e0 11m. T\u00ednh chi\u1ec1u r\u1ed9ng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh vu\u00f4ng c\u00f3 c\u1ea1nh b\u1eb1ng chi\u1ec1u r\u1ed9ng h\u00ecnh ch\u1eef nh\u1eadt, bi\u1ebft di\u1ec7n t\u00edch h\u00ecnh vu\u00f4ng l\u00e0 49cm\u00b2. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i g\u1ea5p \u0111\u00f4i chi\u1ec1u r\u1ed9ng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 14cm, chi\u1ec1u r\u1ed9ng b\u1eb1ng 1\/2 chi\u1ec1u d\u00e0i. T\u00ednh di\u1ec7n t\u00edch.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh vu\u00f4ng c\u00f3 chu vi 52cm. T\u00ednh di\u1ec7n t\u00edch.<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">48 \u00f7 8 = 6cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u221a64 = 8cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(50 \u00f7 2) \u2013 15 = 10cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">36 \u00f7 4 = 9cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">56 \u00f7 7 = 8cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">20 \u00f7 4 = 5cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">99 \u00f7 11 = 9m<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u221a49 = 7cm \u2192 HCN: d\u00e0i = 14cm, r\u1ed9ng = 7cm \u2192 DT = 14 \u00d7 7 = 98cm\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">R\u1ed9ng = 14 \u00f7 2 = 7cm \u2192 DT = 14 \u00d7 7 = 98cm\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">52 \u00f7 4 = 13cm \u2192 DT = 13 \u00d7 13 = 169cm\u00b2<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_3_Bai_toan_co_loi_van\"><\/span>B\u00e0i 3: B\u00e0i to\u00e1n c\u00f3 l\u1eddi v\u0103n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t m\u1ea3nh v\u01b0\u1eddn h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 25m, chi\u1ec1u r\u1ed9ng 12m. T\u00ednh di\u1ec7n t\u00edch v\u00e0 chu vi m\u1ea3nh v\u01b0\u1eddn.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t s\u00e2n tr\u01b0\u1eddng h\u00ecnh vu\u00f4ng c\u00f3 chu vi 80m. T\u00ednh di\u1ec7n t\u00edch s\u00e2n tr\u01b0\u1eddng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t t\u1ea5m b\u1ea3ng h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 1,2m, r\u1ed9ng 0,8m. T\u00ednh di\u1ec7n t\u00edch.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t c\u0103n ph\u00f2ng h\u00ecnh vu\u00f4ng c\u00f3 di\u1ec7n t\u00edch 100m\u00b2. T\u00ednh \u0111\u1ed9 d\u00e0i m\u1ed7i c\u1ea1nh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t t\u1edd gi\u1ea5y h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 di\u1ec7n t\u00edch 210cm\u00b2. N\u1ebfu chi\u1ec1u d\u00e0i l\u00e0 21cm, t\u00ecm chi\u1ec1u r\u1ed9ng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chu vi 60cm. Chi\u1ec1u d\u00e0i h\u01a1n chi\u1ec1u r\u1ed9ng 6cm. T\u00ednh di\u1ec7n t\u00edch h\u00ecnh \u0111\u00f3.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t m\u1ea3nh \u0111\u1ea5t h\u00ecnh vu\u00f4ng c\u00f3 di\u1ec7n t\u00edch 400m\u00b2. T\u00ednh chu vi.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt c\u00f3 chi\u1ec1u d\u00e0i 10cm, di\u1ec7n t\u00edch 80cm\u00b2. T\u00ecm chi\u1ec1u r\u1ed9ng.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t h\u1ed3 n\u01b0\u1edbc h\u00ecnh ch\u1eef nh\u1eadt d\u00e0i 30m, r\u1ed9ng 20m. T\u00ednh chu vi h\u1ed3 n\u01b0\u1edbc.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t h\u00ecnh vu\u00f4ng c\u00f3 c\u1ea1nh 15cm. T\u00ednh di\u1ec7n t\u00edch v\u00e0 chu vi.<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">DT = 25 \u00d7 12 = 300m\u00b2; CV = (25 + 12) \u00d7 2 = 74m<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u1ea1nh = 80 \u00f7 4 = 20m \u2192 DT = 20 \u00d7 20 = 400m\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">1,2 \u00d7 0,8 = 0,96m\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u1ea1nh = \u221a100 = 10m<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">210 \u00f7 21 = 10cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">G\u1ecdi chi\u1ec1u r\u1ed9ng l\u00e0 x \u2192 chi\u1ec1u d\u00e0i = x + 6. Suy ra, (x + x + 6) \u00d7 2 = 60 \u2192 2x + 6 = 30 \u2192 x = 12 \u2192 d\u00e0i = 18 \u2192 DT = 12 \u00d7 18 = 216cm\u00b2<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u1ea1nh = \u221a400 = 20m \u2192 CV = 20 \u00d7 4 = 80m<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">80 \u00f7 10 = 8cm<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">(30 + 20) \u00d7 2 = 100m<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">DT = 15 \u00d7 15 = 225cm\u00b2; CV = 15 \u00d7 4 = 60cm<\/p>\n<\/li>\n<\/ol>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"5_Dang_bai_cac_dau_hieu_chia_het\"><\/span>5. D\u1ea1ng b\u00e0i c\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">D\u1ea1ng to\u00e1n v\u1ec1 d\u1ea5u hi\u1ec7u chia h\u1ebft gi\u00fap h\u1ecdc sinh r\u00e8n luy\u1ec7n kh\u1ea3 n\u0103ng ph\u00e2n t\u00edch s\u1ed1, nh\u1eadn bi\u1ebft v\u00e0 \u00e1p d\u1ee5ng linh ho\u1ea1t c\u00e1c quy t\u1eafc chia h\u1ebft cho 2, 3, 5, 9\u2026 \u0110\u00e2y l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 h\u1ecdc t\u1ed1t c\u00e1c ph\u1ea7n n\u00e2ng cao h\u01a1n nh\u01b0 chia s\u1ed1 c\u00f3 d\u01b0, \u01b0\u1edbc \u2013 b\u1ed9i, ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n, hay ph\u00e9p chia cho s\u1ed1 t\u1ef1 nhi\u00ean l\u1edbn.<\/p>\n<p dir=\"ltr\">C\u00e1c d\u1ea5u hi\u1ec7u chia h\u1ebft c\u01a1 b\u1ea3n:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Chia h\u1ebft cho 2: S\u1ed1 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 0, 2, 4, 6, 8.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Chia h\u1ebft cho 3: T\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 3.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Chia h\u1ebft cho 5: S\u1ed1 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 0 ho\u1eb7c 5.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Chia h\u1ebft cho 9: T\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 9.<\/p>\n<\/li>\n<\/ul>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_1_Nhan_biet_dau_hieu_chia_het\"><\/span>B\u00e0i 1: Nh\u1eadn bi\u1ebft d\u1ea5u hi\u1ec7u chia h\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 124 c\u00f3 chia h\u1ebft cho 2 kh\u00f4ng?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 135 c\u00f3 chia h\u1ebft cho 5 kh\u00f4ng?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 117 c\u00f3 chia h\u1ebft cho 3 kh\u00f4ng?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 81 c\u00f3 chia h\u1ebft cho 9 kh\u00f4ng?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 108 c\u00f3 chia h\u1ebft cho 2 v\u00e0 3 kh\u00f4ng?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 245 c\u00f3 chia h\u1ebft cho 5 kh\u00f4ng?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 999 c\u00f3 chia h\u1ebft cho 9 kh\u00f4ng?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 72 c\u00f3 chia h\u1ebft cho 2, 3, 9 kh\u00f4ng?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 456 c\u00f3 chia h\u1ebft cho 3 kh\u00f4ng?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 318 c\u00f3 chia h\u1ebft cho 2 v\u00e0 3 kh\u00f4ng?<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 (v\u00ec t\u1eadn c\u00f9ng l\u00e0 4)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 (t\u1eadn c\u00f9ng l\u00e0 5)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 (1 + 3 + 5 = 9 chia h\u1ebft cho 3)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 (8 + 1 = 9 chia h\u1ebft cho 9)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 (ch\u1eb5n v\u00e0 t\u1ed5ng ch\u1eef s\u1ed1 l\u00e0 9)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 (t\u1eadn c\u00f9ng l\u00e0 5)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 (9 + 9 + 9 = 27 chia h\u1ebft cho 9)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 (ch\u1eb5n, t\u1ed5ng ch\u1eef s\u1ed1 l\u00e0 9)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">4 + 5 + 6 = 15 \u2192 chia h\u1ebft cho 3 \u2192 C\u00f3<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 (ch\u1eb5n v\u00e0 t\u1ed5ng ch\u1eef s\u1ed1 l\u00e0 12)<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_2_Tim_so_thoa_man_dieu_kien_chia_het\"><\/span>B\u00e0i 2: T\u00ecm s\u1ed1 th\u1ecfa m\u00e3n \u0111i\u1ec1u ki\u1ec7n chia h\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm s\u1ed1 b\u00e9 nh\u1ea5t c\u00f3 2 ch\u1eef s\u1ed1 chia h\u1ebft cho 3.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm s\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 2 ch\u1eef s\u1ed1 chia h\u1ebft cho 5.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 bao nhi\u00eau s\u1ed1 chia h\u1ebft cho 2 t\u1eeb 10 \u0111\u1ebfn 30?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm s\u1ed1 chia h\u1ebft cho c\u1ea3 3 v\u00e0 9 trong c\u00e1c s\u1ed1 sau: 27, 36, 42, 54.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong c\u00e1c s\u1ed1 55, 60, 70, 80, s\u1ed1 n\u00e0o chia h\u1ebft cho 5 nh\u01b0ng kh\u00f4ng chia h\u1ebft cho 2?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft 5 s\u1ed1 chia h\u1ebft cho c\u1ea3 2 v\u00e0 5.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 bao nhi\u00eau s\u1ed1 chia h\u1ebft cho 3 t\u1eeb 1 \u0111\u1ebfn 20?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong c\u00e1c s\u1ed1: 123, 126, 132, s\u1ed1 n\u00e0o chia h\u1ebft cho 3?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 n\u00e0o chia h\u1ebft cho 9: 108, 114, 126?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft ba s\u1ed1 t\u1ef1 nhi\u00ean li\u00ean ti\u1ebfp m\u00e0 s\u1ed1 \u0111\u1ea7u chia h\u1ebft cho 3.<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">12<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">95<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">11 s\u1ed1 (10, 12, &#8230;, 30)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">27, 36, 54<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">55<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">10, 20, 30, 40, 50<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">6 s\u1ed1 (3, 6, 9, 12, 15, 18)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">123 (1+2+3=6), 126 (1+2+6=9), 132 (1+3+2=6) \u2192 c\u1ea3 3 \u0111\u1ec1u chia h\u1ebft cho 3<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">108 (1+0+8=9), 126 (1+2+6=9) \u2192 chia h\u1ebft cho 9<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">3, 4, 5<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_3_Chon_dap_an_dung\"><\/span>B\u00e0i 3: Ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 462 chia h\u1ebft cho:A. 2\u2003\u2003B. 3\u2003\u2003C. 9\u2003\u2003D. C\u1ea3 A v\u00e0 B<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 n\u00e0o d\u01b0\u1edbi \u0111\u00e2y chia h\u1ebft cho 5 nh\u01b0ng kh\u00f4ng chia h\u1ebft cho 2?A. 20\u2003\u2003B. 35\u2003\u2003C. 40\u2003\u2003D. 60<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 b\u1eb1ng 18 th\u00ec chia h\u1ebft cho:A. 2\u2003\u2003B. 3\u2003\u2003C. 9\u2003\u2003D. C\u1ea3 B v\u00e0 C<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Trong c\u00e1c s\u1ed1 sau, s\u1ed1 n\u00e0o kh\u00f4ng chia h\u1ebft cho 3?A. 123\u2003\u2003B. 135\u2003\u2003C. 141\u2003\u2003D. 148<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 c\u00f3 ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng l\u00e0 bao nhi\u00eau th\u00ec ch\u1eafc ch\u1eafn chia h\u1ebft cho 2?A. 5\u2003\u2003B. 3\u2003\u2003C. 6\u2003\u2003D. 7<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">D (v\u00ec 2 v\u00e0 3 \u0111\u1ec1u \u0111\u00fang)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B (35 t\u1eadn c\u00f9ng l\u00e0 5, kh\u00f4ng ch\u1eb5n \u2192 chia h\u1ebft cho 5 nh\u01b0ng kh\u00f4ng cho 2)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">D (18 chia h\u1ebft cho c\u1ea3 3 v\u00e0 9)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">D (1+4+8 = 13, kh\u00f4ng chia h\u1ebft cho 3)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C (6 l\u00e0 s\u1ed1 ch\u1eb5n)<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_4_Dung_hay_sai\"><\/span>B\u00e0i 4: \u0110\u00fang hay sai?<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 100 chia h\u1ebft cho c\u1ea3 2 v\u00e0 5.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u1ebfu t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 chia h\u1ebft cho 9 th\u00ec s\u1ed1 \u0111\u00f3 c\u0169ng chia h\u1ebft cho 3.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 53 chia h\u1ebft cho 5.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 135 chia h\u1ebft cho c\u1ea3 3 v\u00e0 5.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">N\u1ebfu s\u1ed1 chia h\u1ebft cho 2 th\u00ec ch\u1eef s\u1ed1 t\u1eadn c\u00f9ng ph\u1ea3i l\u00e0 s\u1ed1 l\u1ebb.<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S (53 kh\u00f4ng t\u1eadn c\u00f9ng l\u00e0 0 ho\u1eb7c 5)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110 (1+3+5=9 chia h\u1ebft cho 3; t\u1eadn c\u00f9ng l\u00e0 5 n\u00ean chia h\u1ebft cho 5)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S (s\u1ed1 chia h\u1ebft cho 2 ph\u1ea3i t\u1eadn c\u00f9ng b\u1eb1ng s\u1ed1 ch\u1eb5n)<\/p>\n<\/li>\n<\/ol>\n<h4 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_5_Bai_toan_co_loi_van\"><\/span>B\u00e0i 5: B\u00e0i to\u00e1n c\u00f3 l\u1eddi v\u0103n<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u00ecnh c\u00f3 135 vi\u00ean bi, chia \u0111\u1ec1u cho 5 b\u1ea1n. H\u1ecfi m\u1ed7i b\u1ea1n \u0111\u01b0\u1ee3c bao nhi\u00eau vi\u00ean bi?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t th\u00f9ng ch\u1ee9a 108 chai n\u01b0\u1edbc, chia \u0111\u1ec1u v\u00e0o c\u00e1c k\u00e9t, m\u1ed7i k\u00e9t 9 chai. H\u1ecfi c\u00f3 bao nhi\u00eau k\u00e9t?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">L\u1edbp 4A c\u00f3 27 b\u1ea1n. C\u00f4 gi\u00e1o chia \u0111\u1ec1u th\u00e0nh 3 nh\u00f3m. H\u1ecfi m\u1ed7i nh\u00f3m c\u00f3 bao nhi\u00eau b\u1ea1n?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t s\u1ed1 h\u1ecdc sinh x\u1ebfp h\u00e0ng 2, 3, 5 \u0111\u1ec1u v\u1eeba \u0111\u1ee7 h\u00e0ng kh\u00f4ng th\u1eeba. H\u1ecfi s\u1ed1 h\u1ecdc sinh \u0111\u00f3 chia h\u1ebft cho nh\u1eefng s\u1ed1 n\u00e0o?<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">M\u1ed9t s\u1ed1 c\u00f3 t\u1ed5ng c\u00e1c ch\u1eef s\u1ed1 l\u00e0 27, s\u1ed1 \u0111\u00f3 c\u00f3 chia h\u1ebft cho 9 kh\u00f4ng? V\u00ec sao?<\/p>\n<\/li>\n<\/ol>\n<p dir=\"ltr\">\u0110\u00e1p \u00e1n:<\/p>\n<ol>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">135 \u00f7 5 = 27 vi\u00ean<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">108 \u00f7 9 = 12 k\u00e9t<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">27 \u00f7 3 = 9 b\u1ea1n<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Chia h\u1ebft cho 2, 3, 5<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00f3 (v\u00ec 27 chia h\u1ebft cho 9)<\/p>\n<\/li>\n<\/ol>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_on_toan_lop_4_len_lop_5_cho_be_hieu_qua\"><\/span>C\u00e1ch \u00f4n to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 cho b\u00e9 hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Vi\u1ec7c \u00f4n t\u1eadp to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c gi\u00fap h\u1ecdc sinh c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c n\u1ec1n v\u00e0 t\u1ea1o \u0111\u00e0 cho n\u0103m h\u1ecdc m\u1edbi. Giai \u0111o\u1ea1n chuy\u1ec3n ti\u1ebfp n\u00e0y \u0111\u00f2i h\u1ecfi ph\u1ee5 huynh v\u00e0 h\u1ecdc sinh c\u00f3 ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1eadp ph\u00f9 h\u1ee3p \u0111\u1ec3 n\u1eafm ch\u1eafc c\u00e1c d\u1ea1ng to\u00e1n c\u01a1 b\u1ea3n, tr\u00e1nh h\u1ed5ng ki\u1ebfn th\u1ee9c v\u00e0 h\u00ecnh th\u00e0nh th\u00f3i quen h\u1ecdc hi\u1ec7u qu\u1ea3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng c\u00e1ch \u00f4n to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 m\u00e0 ph\u1ee5 huynh c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng \u0111\u1ec3 h\u1ed7 tr\u1ee3 con h\u1ecdc t\u1ed1t h\u01a1n:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"On_lai_kien_thuc_lop_4_mot_cach_he_thong\"><\/span>\u00d4n l\u1ea1i ki\u1ebfn th\u1ee9c l\u1edbp 4 m\u1ed9t c\u00e1ch h\u1ec7 th\u1ed1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Tr\u01b0\u1edbc khi h\u1ecdc n\u1ed9i dung m\u1edbi, c\u1ea7n gi\u00fap h\u1ecdc sinh \u00f4n t\u1eadp l\u1ea1i to\u00e0n b\u1ed9 ki\u1ebfn th\u1ee9c tr\u1ecdng t\u00e2m \u0111\u00e3 h\u1ecdc \u1edf l\u1edbp 4. Chia theo t\u1eebng ch\u1ee7 \u0111\u1ec1 nh\u01b0: s\u1ed1 t\u1ef1 nhi\u00ean, ph\u00e2n s\u1ed1, s\u1ed1 th\u1eadp ph\u00e2n, c\u00e1c ph\u00e9p t\u00ednh, gi\u1ea3i to\u00e1n c\u00f3 l\u1eddi v\u0103n, h\u00ecnh h\u1ecdc&#8230; \u0111\u1ec3 tr\u00e1nh h\u1ecdc d\u00e0n tr\u1ea3i v\u00e0 qu\u00ean l\u00e3ng.<\/p>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/toan-lop-4-giay-the-ki-2.jpg\" alt=\"Ba m\u1eb9 c\u00f9ng b\u00e9 t\u1ed5ng h\u1ee3p v\u00e0 \u00f4n k\u1ef9 ki\u1ebfn th\u1ee9c to\u00e1n l\u1edbp 4 tr\u01b0\u1edbc khi l\u00ean l\u1edbp 5 (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Chia_nho_noi_dung_va_hoc_theo_tung_dang_toan\"><\/span>Chia nh\u1ecf n\u1ed9i dung v\u00e0 h\u1ecdc theo t\u1eebng d\u1ea1ng to\u00e1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Thay v\u00ec h\u1ecdc lan man, n\u00ean ph\u00e2n chia n\u1ed9i dung theo t\u1eebng d\u1ea1ng b\u00e0i nh\u01b0: c\u1ea5u t\u1ea1o s\u1ed1, ph\u00e9p t\u00ednh v\u1edbi ph\u00e2n s\u1ed1, trung b\u00ecnh c\u1ed9ng, di\u1ec7n t\u00edch \u2013 chu vi, d\u1ea5u hi\u1ec7u chia h\u1ebft&#8230; M\u1ed7i bu\u1ed5i h\u1ecdc ch\u1ec9 n\u00ean t\u1eadp trung v\u00e0o m\u1ed9t d\u1ea1ng \u0111\u1ec3 h\u1ecdc sinh d\u1ec5 ti\u1ebfp thu v\u00e0 r\u00e8n luy\u1ec7n s\u00e2u.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ket_hop_ly_thuyet_voi_thuc_hanh_bai_tap\"><\/span>K\u1ebft h\u1ee3p l\u00fd thuy\u1ebft v\u1edbi th\u1ef1c h\u00e0nh b\u00e0i t\u1eadp<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Sau khi nh\u1eafc l\u1ea1i l\u00fd thuy\u1ebft, c\u1ea7n cho h\u1ecdc sinh th\u1ef1c h\u00e0nh v\u1edbi nhi\u1ec1u m\u1ee9c \u0111\u1ed9: t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao, t\u1eeb b\u00e0i ng\u1eafn \u0111\u1ebfn b\u00e0i c\u00f3 l\u1eddi v\u0103n. Vi\u1ec7c gi\u1ea3i b\u00e0i t\u1eadp th\u01b0\u1eddng xuy\u00ean gi\u00fap h\u00ecnh th\u00e0nh k\u1ef9 n\u0103ng v\u00e0 ph\u1ea3n x\u1ea1 l\u00e0m b\u00e0i nhanh, ch\u00ednh x\u00e1c h\u01a1n.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Danh_thoi_gian_hoc_ngan_deu_dan\"><\/span>D\u00e0nh th\u1eddi gian h\u1ecdc ng\u1eafn, \u0111\u1ec1u \u0111\u1eb7n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">H\u1ecdc sinh ti\u1ec3u h\u1ecdc kh\u00f4ng n\u00ean h\u1ecdc qu\u00e1 l\u00e2u m\u1ed9t l\u1ea7n v\u00ec d\u1ec5 m\u1ea5t t\u1eadp trung. Th\u1eddi l\u01b0\u1ee3ng h\u1ee3p l\u00fd cho m\u1ed7i bu\u1ed5i h\u1ecdc l\u00e0 t\u1eeb 20 \u0111\u1ebfn 30 ph\u00fat, m\u1ed7i tu\u1ea7n n\u00ean duy tr\u00ec 4 \u2013 5 bu\u1ed5i. Vi\u1ec7c h\u1ecdc \u0111\u1ec1u \u0111\u1eb7n theo l\u1ecbch s\u1ebd hi\u1ec7u qu\u1ea3 h\u01a1n so v\u1edbi h\u1ecdc d\u1ed3n v\u00e0o m\u1ed9t v\u00e0i ng\u00e0y.<\/p>\n<p><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/2-bai-tap-tieng-anh-he-lop-3-len-4.png\" alt=\"B\u00e9 n\u00ean h\u1ecdc \u0111\u1ec1u \u0111\u1eb7n, kh\u00f4ng n\u00ean ng\u1eaft qu\u00e3ng (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Sua_loi_sai_chi_tiet_va_cung_co_lai_kien_thuc_bi_hong\"><\/span>S\u1eeda l\u1ed7i sai chi ti\u1ebft v\u00e0 c\u1ee7ng c\u1ed1 l\u1ea1i ki\u1ebfn th\u1ee9c b\u1ecb h\u1ed5ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Sau m\u1ed7i b\u00e0i l\u00e0m, ph\u1ee5 huynh n\u00ean c\u00f9ng con ki\u1ec3m tra l\u1ea1i \u0111\u00e1p \u00e1n, ch\u1ec9 r\u00f5 l\u1ed7i sai v\u00e0 l\u00fd do sai. Nh\u1eefng ph\u1ea7n h\u1ecdc sinh hay nh\u1ea7m l\u1eabn c\u1ea7n \u0111\u01b0\u1ee3c \u00f4n l\u1ea1i ngay \u0111\u1ec3 tr\u00e1nh t\u00e1i di\u1ec5n \u1edf c\u00e1c b\u00e0i ti\u1ebfp theo.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cho_hoc_sinh_luyen_de_tong_hop_sau_khi_da_on_xong_tung_dang\"><\/span>Cho h\u1ecdc sinh luy\u1ec7n \u0111\u1ec1 t\u1ed5ng h\u1ee3p sau khi \u0111\u00e3 \u00f4n xong t\u1eebng d\u1ea1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Sau khi \u0111\u00e3 luy\u1ec7n ri\u00eang t\u1eebng d\u1ea1ng to\u00e1n, n\u00ean cho h\u1ecdc sinh l\u00e0m c\u00e1c b\u00e0i ki\u1ec3m tra t\u1ed5ng h\u1ee3p nh\u01b0 m\u1ed9t \u0111\u1ec1 thi th\u1eed. Qua \u0111\u00f3 \u0111\u00e1nh gi\u00e1 kh\u1ea3 n\u0103ng bao qu\u00e1t, k\u1ef9 n\u0103ng ph\u00e2n b\u1ed5 th\u1eddi gian v\u00e0 nh\u1eadn bi\u1ebft \u0111i\u1ec3m y\u1ebfu c\u1ea7n b\u1ed5 sung.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tao_tam_ly_hoc_tich_cuc_khong_gay_ap_luc\"><\/span>T\u1ea1o t\u00e2m l\u00fd h\u1ecdc t\u00edch c\u1ef1c, kh\u00f4ng g\u00e2y \u00e1p l\u1ef1c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ph\u1ee5 huynh n\u00ean t\u1ea1o m\u00f4i tr\u01b0\u1eddng h\u1ecdc nh\u1eb9 nh\u00e0ng, kh\u00edch l\u1ec7 tinh th\u1ea7n h\u1ecdc t\u1eadp v\u00e0 gi\u00fap con h\u00ecnh th\u00e0nh th\u00e1i \u0111\u1ed9 t\u00edch c\u1ef1c v\u1edbi m\u00f4n To\u00e1n. Kh\u00f4ng n\u00ean so s\u00e1nh v\u1edbi b\u1ea1n kh\u00e1c ho\u1eb7c g\u00e2y \u00e1p l\u1ef1c \u0111i\u1ec3m s\u1ed1 khi\u1ebfn b\u00e9 s\u1ee3 h\u1ecdc.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Hoc_toan_lop_4_len_lop_5_hieu_qua_hon_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math_co_hoi_nhan_uu_dai_toi_50\"><\/span>H\u1ecdc to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 hi\u1ec7u qu\u1ea3 h\u01a1n c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math, c\u01a1 h\u1ed9i nh\u1eadn \u01b0u \u0111\u00e3i t\u1edbi 50%<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Vi\u1ec7c \u00f4n t\u1eadp to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 kh\u00f4ng ch\u1ec9 gi\u00fap h\u1ecdc sinh c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c n\u1ec1n m\u00e0 c\u00f2n t\u1ea1o b\u01b0\u1edbc \u0111\u1ec7m quan tr\u1ecdng \u0111\u1ec3 l\u00e0m quen v\u1edbi n\u1ed9i dung n\u00e2ng cao c\u1ee7a l\u1edbp 5. Tuy nhi\u00ean, kh\u00f4ng ph\u1ea3i b\u00e9 n\u00e0o c\u0169ng h\u1ee9ng th\u00fa v\u1edbi vi\u1ec7c h\u1ecdc l\u00fd thuy\u1ebft hay l\u00e0m b\u00e0i t\u1eadp kh\u00f4 khan tr\u00ean gi\u1ea5y.<\/p>\n<p dir=\"ltr\">\u0110\u1ec3 vi\u1ec7c \u00f4n luy\u1ec7n tr\u1edf n\u00ean nh\u1eb9 nh\u00e0ng v\u00e0 sinh \u0111\u1ed9ng h\u01a1n, nhi\u1ec1u ph\u1ee5 huynh \u0111\u00e3 l\u1ef1a ch\u1ecdn k\u1ebft h\u1ee3p c\u00f9ng \u1ee9ng d\u1ee5ng h\u1ecdc to\u00e1n Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math, m\u1ed9t n\u1ec1n t\u1ea3ng h\u1ecdc t\u1eadp t\u01b0\u01a1ng t\u00e1c \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf ri\u00eang cho tr\u1ebb em t\u1eeb m\u1ea7m non \u0111\u1ebfn ti\u1ec3u h\u1ecdc. V\u1edbi ch\u01b0\u01a1ng tr\u00ecnh b\u00e1m s\u00e1t chu\u1ea9n gi\u00e1o d\u1ee5c ph\u1ed5 th\u00f4ng m\u1edbi, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math gi\u00fap b\u00e9 luy\u1ec7n to\u00e1n th\u00f4ng qua c\u00e1c tr\u00f2 ch\u01a1i t\u01b0 duy, h\u00ecnh \u1ea3nh sinh \u0111\u1ed9ng v\u00e0 t\u00ecnh hu\u1ed1ng g\u1ea7n g\u0169i, t\u1eeb \u0111\u00f3 r\u00e8n k\u1ef9 n\u0103ng t\u00ednh to\u00e1n, kh\u1ea3 n\u0103ng suy lu\u1eadn v\u00e0 ph\u1ea3n x\u1ea1 nhanh trong gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1.<\/p>\n<p dir=\"ltr\">Kh\u00f4ng ch\u1ec9 d\u1eebng l\u1ea1i \u1edf vi\u1ec7c luy\u1ec7n to\u00e1n, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math c\u00f2n h\u1ed7 tr\u1ee3 tr\u1ebb ph\u00e1t tri\u1ec3n t\u01b0 duy ng\u00f4n ng\u1eef th\u00f4ng qua vi\u1ec7c ti\u1ebfp c\u1eadn to\u00e0n b\u1ed9 b\u00e0i h\u1ecdc b\u1eb1ng ti\u1ebfng Anh chu\u1ea9n qu\u1ed1c t\u1ebf. \u0110\u00e2y l\u00e0 m\u1ed9t l\u1ee3i th\u1ebf l\u1edbn gi\u00fap tr\u1ebb ti\u1ebfp c\u1eadn to\u00e1n h\u1ecdc hi\u1ec7n \u0111\u1ea1i m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean v\u00e0 hi\u1ec7u qu\u1ea3. Ph\u1ee5 huynh ho\u00e0n to\u00e0n c\u00f3 th\u1ec3 \u0111\u1ed3ng h\u00e0nh c\u00f9ng con h\u1ecdc t\u1eadp m\u1ed7i ng\u00e0y v\u1edbi th\u1eddi l\u01b0\u1ee3ng linh ho\u1ea1t, kh\u00f4ng \u00e1p l\u1ef1c, l\u1ea1i \u0111\u1ea3m b\u1ea3o ti\u1ebfn \u0111\u1ed9 nh\u1edd h\u1ec7 th\u1ed1ng theo d\u00f5i v\u00e0 c\u00e1 nh\u00e2n h\u00f3a l\u1ed9 tr\u00ecnh h\u1ecdc.<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><iframe loading=\"lazy\" title=\"Gi\u1edbi thi\u1ec7u \u1ee9ng d\u1ee5ng Monkey Math\" width=\"1020\" height=\"574\" src=\"https:\/\/www.youtube.com\/embed\/7DsjpvHFrOs?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p dir=\"ltr\">Hi\u1ec7n t\u1ea1i, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math \u0111ang c\u00f3 ch\u01b0\u01a1ng tr\u00ecnh \u01b0u \u0111\u00e3i h\u1ea5p d\u1eabn l\u00ean t\u1edbi 50% h\u1ecdc ph\u00ed cho c\u00e1c g\u00f3i \u0111\u0103ng k\u00fd s\u1edbm. \u0110\u00e2y l\u00e0 c\u01a1 h\u1ed9i tuy\u1ec7t v\u1eddi \u0111\u1ec3 \u0111\u1ea7u t\u01b0 cho con m\u1ed9t h\u00e0nh trang v\u1eefng ch\u1eafc, v\u1eeba h\u1ecdc t\u1ed1t to\u00e1n v\u1eeba ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n trong nh\u1eefng n\u0103m \u0111\u1ea7u ti\u1ec3u h\u1ecdc. \u0110\u0103ng k\u00fd ngay h\u00f4m nay \u0111\u1ec3 kh\u00f4ng b\u1ecf l\u1ee1!<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">&gt;&gt;&gt;&gt;&gt; \u0110\u0102NG K\u00dd H\u1eccC TH\u1eec MI\u1ec4N PH\u00cd NGAY<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Toan_lop_4_len_lop_5_Ket_hop_hoc_tieng_Anh_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_de_phat_trien_toan_dien\"><\/span>To\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5: K\u1ebft h\u1ee3p h\u1ecdc ti\u1ebfng Anh c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef \u0111\u1ec3 ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u1ede giai \u0111o\u1ea1n chu\u1ea9n b\u1ecb t\u1eeb l\u1edbp 4 l\u00ean l\u1edbp 5, b\u00ean c\u1ea1nh vi\u1ec7c \u00f4n t\u1eadp to\u00e1n h\u1ecdc, vi\u1ec7c r\u00e8n luy\u1ec7n ti\u1ebfng Anh c\u0169ng gi\u1eef vai tr\u00f2 v\u00f4 c\u00f9ng quan tr\u1ecdng. \u0110\u00e2y l\u00e0 th\u1eddi \u0111i\u1ec3m h\u1ecdc sinh b\u1eaft \u0111\u1ea7u ti\u1ebfp x\u00fac nhi\u1ec1u h\u01a1n v\u1edbi c\u00e1c m\u00f4n h\u1ecdc t\u00edch h\u1ee3p, n\u1ed9i dung phong ph\u00fa v\u00e0 y\u00eau c\u1ea7u t\u01b0 duy \u0111a chi\u1ec1u h\u01a1n. N\u1ebfu b\u00e9 c\u00f3 n\u1ec1n t\u1ea3ng ti\u1ebfng Anh t\u1ed1t t\u1eeb s\u1edbm, vi\u1ec7c ti\u1ebfp c\u1eadn ki\u1ebfn th\u1ee9c m\u1edbi s\u1ebd tr\u1edf n\u00ean d\u1ec5 d\u00e0ng, t\u1ef1 tin v\u00e0 ch\u1ee7 \u0111\u1ed9ng h\u01a1n.<\/p>\n<p dir=\"ltr\">Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef \u2013 si\u00eau \u1ee9ng d\u1ee5ng h\u1ecdc ti\u1ebfng Anh cho tr\u1ebb t\u1eeb 0 \u0111\u1ebfn 11 tu\u1ed5i l\u00e0 l\u1ef1a ch\u1ecdn l\u00fd t\u01b0\u1edfng \u0111\u1ec3 \u0111\u1ed3ng h\u00e0nh c\u00f9ng b\u00e9 trong giai \u0111o\u1ea1n n\u00e0y. V\u1edbi ch\u01b0\u01a1ng tr\u00ecnh thi\u1ebft k\u1ebf ri\u00eang cho tr\u1ebb Vi\u1ec7t Nam, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef gi\u00fap b\u00e9 l\u00e0m quen v\u00e0 ghi nh\u1edb t\u1eeb v\u1ef1ng, ph\u00e1t \u00e2m chu\u1ea9n, luy\u1ec7n k\u1ef9 n\u0103ng nghe \u2013 n\u00f3i \u2013 \u0111\u1ecdc &#8211; vi\u1ebft th\u00f4ng qua c\u00e1c b\u00e0i h\u1ecdc sinh \u0111\u1ed9ng, c\u00f3 l\u1ed9 tr\u00ecnh c\u00e1 nh\u00e2n h\u00f3a r\u00f5 r\u00e0ng.<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><iframe loading=\"lazy\" title=\"Monkey Junior | L\u1ed9 tr\u00ecnh h\u1ecdc to\u00e0n di\u1ec7n cho tr\u1ebb\" width=\"1020\" height=\"574\" src=\"https:\/\/www.youtube.com\/embed\/OtpUoA_lkuk?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p dir=\"ltr\">C\u00e1c b\u00e0i h\u1ecdc \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng ng\u1eafn g\u1ecdn, th\u00fa v\u1ecb v\u00e0 ph\u00f9 h\u1ee3p theo t\u1eebng c\u1ea5p \u0111\u1ed9, gi\u00fap tr\u1ebb h\u00ecnh th\u00e0nh th\u00f3i quen h\u1ecdc ti\u1ebfng Anh m\u1ed7i ng\u00e0y m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean, kh\u00f4ng \u00e1p l\u1ef1c.<\/p>\n<p dir=\"ltr\">Vi\u1ec7c k\u1ebft h\u1ee3p gi\u1eefa Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math v\u00e0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd gi\u00fap tr\u1ebb ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n c\u1ea3 v\u1ec1 t\u01b0 duy logic v\u00e0 ng\u00f4n ng\u1eef, t\u1eeb \u0111\u00f3 n\u00e2ng cao kh\u1ea3 n\u0103ng h\u1ecdc t\u1eadp \u1edf b\u1eadc ti\u1ec3u h\u1ecdc v\u00e0 chu\u1ea9n b\u1ecb s\u1eb5n s\u00e0ng cho c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc song ng\u1eef ho\u1eb7c qu\u1ed1c t\u1ebf.<\/p>\n<p dir=\"ltr\">Ph\u1ee5 huynh c\u00f3 th\u1ec3 tham kh\u1ea3o v\u00e0 \u0111\u0103ng k\u00fd ngay h\u00f4m nay \u0111\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c \u01b0u \u0111\u00e3i h\u1ecdc ph\u00ed l\u00ean t\u1edbi 50% t\u1eeb Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef \u2013 c\u01a1 h\u1ed9i ti\u1ebft ki\u1ec7m chi ph\u00ed v\u00e0 \u0111\u1ea7u t\u01b0 hi\u1ec7u qu\u1ea3 cho con trong nh\u1eefng n\u0103m h\u1ecdc \u0111\u1ea7u \u0111\u1eddi.<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">&gt;&gt;&gt;&gt;&gt; \u0110\u0102NG K\u00dd H\u1eccC TH\u1eec MI\u1ec4N PH\u00cd NGAY<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/p>\n<p dir=\"ltr\">Vi\u1ec7c \u00f4n t\u1eadp to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 \u0111\u00fang c\u00e1ch s\u1ebd gi\u00fap h\u1ecdc sinh t\u1ef1 tin b\u01b0\u1edbc v\u00e0o n\u0103m h\u1ecdc m\u1edbi v\u1edbi n\u1ec1n t\u1ea3ng ki\u1ebfn th\u1ee9c v\u1eefng ch\u1eafc. Ph\u1ee5 huynh n\u00ean l\u1ef1a ch\u1ecdn ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc ph\u00f9 h\u1ee3p, k\u1ebft h\u1ee3p t\u00e0i li\u1ec7u ch\u1ea5t l\u01b0\u1ee3ng v\u00e0 c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 nh\u01b0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math \u0111\u1ec3 \u0111\u1ed3ng h\u00e0nh c\u00f9ng con hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<p>Ngu\u1ed3n: <a href=\"http:\/\/www.ckconitsha.com\/vn\/\">http:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>To\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 l\u00e0 giai \u0111o\u1ea1n quan tr\u1ecdng gi\u00fap h\u1ecdc sinh c\u1ee7ng c\u1ed1 ki\u1ebfn th\u1ee9c v\u00e0 chu\u1ea9n b\u1ecb t\u1ed1t cho ch\u01b0\u01a1ng tr\u00ecnh h\u1ecdc m\u1edbi. V\u1edbi b\u1ed9 tr\u1ecdn b\u1ed9 b\u00e0i t\u1eadp to\u00e1n l\u1edbp 4 l\u00ean l\u1edbp 5 k\u00e8m theo ph\u01b0\u01a1ng ph\u00e1p \u00f4n luy\u1ec7n hi\u1ec7u qu\u1ea3 m\u00e0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-36718","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/36718","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=36718"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/36718\/revisions"}],"predecessor-version":[{"id":37339,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/36718\/revisions\/37339"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=36718"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=36718"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=36718"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}