{"id":14880,"date":"2025-06-10T16:30:37","date_gmt":"2025-06-10T09:30:37","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=14880"},"modified":"2025-07-05T16:00:07","modified_gmt":"2025-07-05T09:00:07","slug":"ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat\/","title":{"rendered":"L\u00fd thuy\u1ebft v\u00e0 c\u00e1ch l\u00e0m b\u00e0i nh\u00e2n m\u1ed9t s\u1ed1 v\u1edbi m\u1ed9t hi\u1ec7u l\u1edbp 4 d\u1ec5 d\u00e0ng nh\u1ea5t"},"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\/ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat\/#Cach_nhan_mot_so_lop_4\" >C\u00e1ch nh\u00e2n m\u1ed9t s\u1ed1 l\u1edbp 4<\/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\/ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat\/#Phuong_phap_giup_con_ban_thuc_hien_bai_toan_4_diem_voi_tin_hieu\" >Ph\u01b0\u01a1ng ph\u00e1p gi\u00fap con b\u1ea1n th\u1ef1c hi\u1ec7n b\u00e0i to\u00e1n 4 \u0111i\u1ec3m v\u1edbi t\u00edn hi\u1ec7u<\/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\/ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat\/#Ghi_nho_ly_thuyet_va_cach_giai_quyet_van_de_bang_1_lop_4\" >Ghi nh\u1edb l\u00fd thuy\u1ebft v\u00e0 c\u00e1ch gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 b\u1eb1ng 1 l\u1edbp 4<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat\/#Thuc_hanh_cac_ky_nang_de_tinh_toan_nhanh_chong_va_chinh_xac\" >Th\u1ef1c h\u00e0nh c\u00e1c k\u1ef9 n\u0103ng \u0111\u1ec3 t\u00ednh to\u00e1n nhanh ch\u00f3ng v\u00e0 ch\u00ednh x\u00e1c<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat\/#Tim_hieu_cach_su_dung_may_tinh_bo_tui_de_ho_tro_tinh_toan\" >T\u00ecm hi\u1ec3u c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u1ec3 h\u1ed7 tr\u1ee3 t\u00ednh to\u00e1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat\/#Thuong_xuyen_thuc_hanh_toan_hoc_lop_4_voi_mot_so_thuong_hieu\" >Th\u01b0\u1eddng xuy\u00ean th\u1ef1c h\u00e0nh to\u00e1n h\u1ecdc l\u1edbp 4 v\u1edbi m\u1ed9t s\u1ed1 th\u01b0\u01a1ng hi\u1ec7u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat\/#Cung_co_kien_%E2%80%8B%E2%80%8Bthuc_toan_hoc_voi_ung_dung_toan_hoc_khi\" >C\u1ee7ng c\u1ed1 ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc v\u1edbi \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc kh\u1ec9<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat\/#Mot_so_van_de_lop_4_nhan_len_mot_so_voi_mot_ten_cho_hoc_sinh_thuc_hanh\" >M\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 l\u1edbp 4 nh\u00e2n l\u00ean m\u1ed9t s\u1ed1 v\u1edbi m\u1ed9t t\u00ean cho h\u1ecdc sinh th\u1ef1c h\u00e0nh<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat\/#Giai_quyet_cac_bai_toan_lop_4_voi_mot_so_trang_67_68_sach_giao_khoa\" >Gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n l\u1edbp 4 v\u1edbi m\u1ed9t s\u1ed1 trang 67, 68 s\u00e1ch gi\u00e1o khoa<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/ly-thuyet-va-cach-lam-bai-nhan-mot-so-voi-mot-hieu-lop-4-de-dang-nhat\/#Mot_so_the_nhan_len_mot_so_voi_toan_hoc_lop_4_de_ho_tu_thuc_hanh\" >M\u1ed9t s\u1ed1 th\u1ebb nh\u00e2n l\u00ean m\u1ed9t s\u1ed1 v\u1edbi to\u00e1n h\u1ecdc l\u1edbp 4 \u0111\u1ec3 h\u1ecd t\u1ef1 th\u1ef1c h\u00e0nh<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>Trong b\u00e0i h\u1ecdc to\u00e1n l\u1edbp 4 tr\u01b0\u1edbc \u0111\u00f3, h\u1ecd \u0111\u00e3 l\u00e0m quen v\u1edbi h\u00ecnh th\u1ee9c b\u00e0i t\u1eadp nh\u00e2n v\u1edbi m\u1ed9t kho\u1ea3n ti\u1ec1n. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady trong b\u00e0i h\u1ecdc n\u00e0y, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd ti\u1ebfp t\u1ee5c h\u01b0\u1edbng d\u1eabn h\u1ecd h\u1ecdc c\u00e1ch gi\u1ea3i t\u1eadp c\u00e1c b\u00e0i t\u1eadp nh\u00e2n v\u1edbi m\u1ed9t th\u01b0\u01a1ng hi\u1ec7u chi ti\u1ebft v\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc to\u00e1n t\u1ed1t<\/p>\n<p>                        Xem t\u1ea5t c\u1ea3<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_nhan_mot_so_lop_4\"><\/span>C\u00e1ch nh\u00e2n m\u1ed9t s\u1ed1 l\u1edbp 4<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Tr\u01b0\u1edbc khi t\u00ecm hi\u1ec3u v\u1ec1 c\u00e1ch t\u00ednh s\u1ed1 l\u01b0\u1ee3ng c\u1ee7a m\u1ed9t s\u1ed1 ng\u01b0\u1eddi c\u00f3 l\u1edbp 4, ch\u00fang ta h\u00e3y \u0111\u1ebfn Kh\u1ec9 \u0111\u1ec3 gi\u1ea3i quy\u1ebft v\u00ed d\u1ee5 c\u1ee7a v\u00ed d\u1ee5 d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n<p dir=\"ltr\">Ch\u1ee7 \u0111\u1ec1: T\u00ednh v\u00e0 so s\u00e1nh gi\u00e1 tr\u1ecb c\u1ee7a hai bi\u1ec3u th\u1ee9c:<\/p>\n<p dir=\"ltr\">3 \u00d7 (8\u22125) v\u00e0 3 \u00d7 8\u22123 \u00d7 5.<\/p>\n<p dir=\"ltr\">Ch\u00fang t\u00f4i c\u00f3:<\/p>\n<p dir=\"ltr\">3 \u00d7 (8\u22125) = 3 \u00d7 3 = 9;<\/p>\n<p dir=\"ltr\">3 \u00d7 8\u22123 \u00d7 5 = 24\u221215 = 9;<\/p>\n<p dir=\"ltr\">=&gt; 3 \u00d7 (8\u22125) = 3 \u00d7 8\u22123 \u00d7 5 = 9<\/p>\n<p dir=\"ltr\">T\u1eeb v\u00ed d\u1ee5 tr\u00ean, ch\u00fang t\u00f4i r\u00fat ra k\u1ebft lu\u1eadn v\u1ec1 c\u00e1ch t\u00ednh l\u1edbp 4 trong ph\u00e9p nh\u00e2n v\u1edbi th\u01b0\u01a1ng hi\u1ec7u sau:<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fff4f5;border-style: solid\">\n<tr>\n<td>\n<p dir=\"ltr\">C\u00f3 2 c\u00e1ch \u0111\u1ec3 t\u00ednh to\u00e1n m\u1ed9t s\u1ed1 s\u1ed1:<\/p>\n<ul>\n<li dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p 1: Khi nh\u00e2n v\u1edbi t\u00edn hi\u1ec7u, ch\u00fang ta c\u00f3 th\u1ec3 l\u1ea7n l\u01b0\u1ee3t quay s\u1ed1 \u0111\u00f3 v\u1edbi s\u1ed1 kh\u1ea5u tr\u1eeb v\u00e0 s\u1ed1 tr\u1eeb, sau \u0111\u00f3 l\u1ea5y s\u1ea3n ph\u1ea9m \u0111\u1ea7u ti\u00ean tr\u1eeb s\u1ea3n ph\u1ea9m th\u1ee9 hai l\u00e0 c\u00e2u tr\u1ea3 l\u1eddi.<\/li>\n<\/ul>\n<p dir=\"ltr\" style=\"padding-left: 40px\">C\u00f4ng th\u1ee9c: A \u00d7 (B &#8211; C) = A \u00d7 B &#8211; A \u00d7 C<\/p>\n<ul>\n<li dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p 2: Khi nh\u00e2n v\u1edbi t\u00edn hi\u1ec7u, tr\u01b0\u1edbc ti\u00ean ch\u00fang ta c\u00f3 th\u1ec3 t\u00ednh to\u00e1n s\u1ef1 kh\u00e1c bi\u1ec7t trong ngo\u1eb7c, sau \u0111\u00f3 l\u1ea5y s\u1ed1 \u0111\u00f3 v\u1edbi t\u00ean v\u1eeba \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y.<\/li>\n<\/ul>\n<p dir=\"ltr\" style=\"padding-left: 40px\">C\u00f4ng th\u1ee9c: A \u00d7 (B &#8211; C) = A \u00d7 M (\u0111\u1ed1i v\u1edbi M l\u00e0 s\u1ef1 kh\u00e1c bi\u1ec7t c\u1ee7a t\u00ednh to\u00e1n B &#8211; C)<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/1-nhan-mot-so-voi-mot-hieu.jpg\" alt=\"To\u00e1n h\u1ecdc l\u1edbp 4 nh\u00e2n v\u1edbi m\u1ed9t v\u1edbi m\u1ed9t. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\" height=\"500\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Phuong_phap_giup_con_ban_thuc_hien_bai_toan_4_diem_voi_tin_hieu\"><\/span>Ph\u01b0\u01a1ng ph\u00e1p gi\u00fap con b\u1ea1n th\u1ef1c hi\u1ec7n b\u00e0i to\u00e1n 4 \u0111i\u1ec3m v\u1edbi t\u00edn hi\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Hi\u1ec3u v\u00e0 ghi nh\u1edb c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u00ednh to\u00e1n l\u1edbp 4 v\u1edbi th\u01b0\u01a1ng hi\u1ec7u, b\u1ea1n s\u1ebd bi\u1ebft c\u00e1ch gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp c\u01a1 b\u1ea3n. Tuy nhi\u00ean, \u0111\u1ec3 gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp d\u1ec5 d\u00e0ng nh\u1ea5t, \u0111\u1eb7c bi\u1ec7t l\u00e0 b\u1ea1n c\u00f3 th\u1ec3 v\u01b0\u1ee3t qua c\u00e1c b\u00e0i t\u1eadp nh\u00e2n l\u00ean m\u1ed9t s\u1ed1 v\u1edbi c\u00e1c hi\u1ec7u \u1ee9ng n\u00e2ng cao, b\u1ea1n c\u1ea7n m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc t\u1eadp hi\u1ec7u qu\u1ea3.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ghi_nho_ly_thuyet_va_cach_giai_quyet_van_de_bang_1_lop_4\"><\/span>Ghi nh\u1edb l\u00fd thuy\u1ebft v\u00e0 c\u00e1ch gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 b\u1eb1ng 1 l\u1edbp 4<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Hi\u1ec3u v\u1ec1 l\u00fd thuy\u1ebft, b\u1ea3n ch\u1ea5t v\u00e0 n\u1eafm b\u1eaft c\u00e1c c\u00f4ng th\u1ee9c t\u00ednh to\u00e1n l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng khi h\u1ecdc b\u1ea5t k\u1ef3 v\u1ea5n \u0111\u1ec1 n\u00e0o, kh\u00f4ng ch\u1ec9 l\u00e0 m\u1ed9t s\u1ed1 l\u1edbp 4. \u0110i\u1ec1u n\u00e0y s\u1ebd gi\u00fap h\u1ecd bi\u1ebft quy\u1ec1n gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp, tr\u00e1nh t\u00ecnh hu\u1ed1ng sai, d\u1eabn \u0111\u1ebfn k\u1ebft qu\u1ea3 kh\u00f4ng ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\">Do \u0111\u00f3, h\u1ecdc sinh c\u1ea7n ghi nh\u1edb hai c\u00e1ch \u0111\u1ec3 gi\u1ea3i quy\u1ebft to\u00e1n to\u00e1n 4 k\u1ebft th\u00fac v\u1edbi m\u1ed9t trong nh\u1eefng c\u00e1ch m\u00e0 kh\u1ec9 \u0111\u00e3 n\u00eau \u1edf tr\u00ean. Cha m\u1eb9 c\u0169ng n\u00ean d\u00e0nh m\u1ed9t ch\u00fat th\u1eddi gian \u0111\u1ec3 t\u00ecm hi\u1ec3u v\u1ec1 lo\u1ea1i b\u00e0i t\u1eadp n\u00e0y \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn v\u00e0 gi\u1ea3i th\u00edch n\u1ebfu b\u1ea1n kh\u00f4ng hi\u1ec3u.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/2-nhan-mot-so-voi-mot-hieu.jpg\" alt=\"Tr\u1ebb em c\u1ea7n ghi nh\u1edb c\u00f4ng th\u1ee9c \u0111\u1ec3 t\u00ednh to\u00e1n m\u1ed9t s\u1ed1 l\u1edbp 4. (\u1ea2nh: S\u01b0u t\u1ea7m Internet)\" width=\"800\" height=\"500\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Thuc_hanh_cac_ky_nang_de_tinh_toan_nhanh_chong_va_chinh_xac\"><\/span>Th\u1ef1c h\u00e0nh c\u00e1c k\u1ef9 n\u0103ng \u0111\u1ec3 t\u00ednh to\u00e1n nhanh ch\u00f3ng v\u00e0 ch\u00ednh x\u00e1c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trong m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp \u0111\u01a1n gi\u1ea3n, t\u00ednh to\u00e1n ch\u1ec9 d\u1eebng l\u1ea1i v\u1edbi s\u1ed1 l\u01b0\u1ee3ng nh\u1ecf, k\u1ef9 n\u0103ng tinh th\u1ea7n nhanh ch\u00f3ng s\u1ebd r\u1ea5t h\u1eefu \u00edch. H\u1ecd s\u1ebd ho\u00e0n th\u00e0nh b\u00e0i t\u1eadp ch\u00ednh x\u00e1c m\u00e0 kh\u00f4ng d\u00e0nh qu\u00e1 nhi\u1ec1u th\u1eddi gian \u0111\u1ec3 t\u00ednh to\u00e1n. M\u1ed9t s\u1ed1 c\u00e1ch \u0111\u01a1n gi\u1ea3n nh\u1ea5t \u0111\u1ec3 t\u00ednh to\u00e1n tinh th\u1ea7n tinh th\u1ea7n l\u00e0 ghi nh\u1edb ch\u00edn ch\u01b0\u01a1ng, b\u1ea3ng \u0111i\u1ec3m c\u1ed9ng; T\u00e1ch ho\u1eb7c nh\u00f3m th\u00e0nh h\u00e0ng ch\u1ee5c, h\u00e0ng tr\u0103m, &#8230; cha m\u1eb9 n\u00ean t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 t\u00ednh to\u00e1n nhanh \u0111\u1ec3 h\u01b0\u1edbng d\u1eabn tr\u1ebb em \u1edf nh\u00e0.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Tim_hieu_cach_su_dung_may_tinh_bo_tui_de_ho_tro_tinh_toan\"><\/span>T\u00ecm hi\u1ec3u c\u00e1ch s\u1eed d\u1ee5ng m\u00e1y t\u00ednh b\u1ecf t\u00fai \u0111\u1ec3 h\u1ed7 tr\u1ee3 t\u00ednh to\u00e1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">M\u00e1y t\u00ednh b\u1ecf t\u00fai c\u00f3 t\u00e1c d\u1ee5ng gi\u00fap ch\u00fang t\u00ednh to\u00e1n s\u1ed1 l\u01b0\u1ee3ng l\u1edbn l\u1edbn. Tuy nhi\u00ean, tr\u01b0\u1edbc khi h\u01b0\u1edbng d\u1eabn tr\u1ebb em s\u1eed d\u1ee5ng c\u00e1c k\u1ef9 n\u0103ng m\u00e1y t\u00ednh \u0111\u1ec3 h\u1ed7 tr\u1ee3 nghi\u00ean c\u1ee9u to\u00e1n h\u1ecdc, ph\u1ee5 huynh c\u1ea7n y\u00eau c\u1ea7u gi\u00e1o vi\u00ean xem li\u1ec7u ch\u00fang c\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng kh\u00f4ng.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Thuong_xuyen_thuc_hanh_toan_hoc_lop_4_voi_mot_so_thuong_hieu\"><\/span>Th\u01b0\u1eddng xuy\u00ean th\u1ef1c h\u00e0nh to\u00e1n h\u1ecdc l\u1edbp 4 v\u1edbi m\u1ed9t s\u1ed1 th\u01b0\u01a1ng hi\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Th\u01b0\u1eddng xuy\u00ean gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp to\u00e1n 4 -k\u1ebft th\u00fac v\u1edbi m\u1ed9t s\u1ed1 c\u00f3 m\u1ed9t t\u00ean l\u00e0 m\u1ed9t c\u00e1ch \u0111\u1ec3 h\u1ecd ghi nh\u1edb ki\u1ebfn \u200b\u200bth\u1ee9c, t\u0103ng c\u01b0\u1eddng c\u00e1c k\u1ef9 n\u0103ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n b\u00e0i ki\u1ec3m tra c\u1ef1c k\u1ef3 hi\u1ec7u qu\u1ea3. T\u1eeb \u0111\u00f3, h\u1ecd s\u1ebd d\u1ec5 d\u00e0ng gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao trong s\u00e1ch gi\u00e1o khoa, b\u00e0i t\u1eadp ho\u1eb7c b\u00e0i ki\u1ec3m tra quan tr\u1ecdng.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cung_co_kien_%E2%80%8B%E2%80%8Bthuc_toan_hoc_voi_ung_dung_toan_hoc_khi\"><\/span>C\u1ee7ng c\u1ed1 ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc v\u1edbi \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc kh\u1ec9<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ngo\u00e0i c\u00e1c ph\u01b0\u01a1ng ph\u00e1p tr\u00ean, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math l\u00e0 m\u1ed9t &#8220;ng\u01b0\u1eddi b\u1ea1n&#8221; \u0111i c\u00f9ng tr\u1ebb em h\u1ecdc to\u00e1n r\u1ea5t hi\u1ec7u qu\u1ea3. \u0110\u00e2y l\u00e0 m\u1ed9t \u1ee9ng d\u1ee5ng c\u1ee7a gi\u1ea3ng d\u1ea1y to\u00e1n theo ch\u01b0\u01a1ng tr\u00ecnh gi\u00e1o d\u1ee5c m\u1edbi cho tr\u1ebb m\u1eabu gi\u00e1o v\u00e0 tr\u1ebb ti\u1ec3u h\u1ecdc b\u1eb1ng ti\u1ebfng Anh.<\/p>\n<p dir=\"ltr\">Ch\u01b0\u01a1ng tr\u00ecnh gi\u1ea3ng d\u1ea1y c\u1ee7a \u1ee9ng d\u1ee5ng n\u00e0y \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf theo ph\u01b0\u01a1ng ph\u00e1p m\u1edbi c\u1ee7a B\u1ed9 Gi\u00e1o d\u1ee5c v\u00e0 \u0110\u00e0o t\u1ea1o, \u0111\u01b0\u1ee3c chia th\u00e0nh 4 c\u1ea5p \u0111\u1ed9 t\u1eeb c\u01a1 b\u1ea3n \u0111\u1ebfn n\u00e2ng cao, ph\u00f9 h\u1ee3p cho t\u1eebng \u0111\u1ed9 tu\u1ed5i v\u00e0 tr\u00ecnh \u0111\u1ed9 c\u1ee7a tr\u1ebb em. Bao g\u1ed3m h\u01a1n 400 b\u00e0i h\u1ecdc, h\u01a1n 10.000 ho\u1ea1t \u0111\u1ed9ng chia cho 60 ch\u1ee7 \u0111\u1ec1 thu\u1ed9c 7 ch\u1ee7 \u0111\u1ec1 to\u00e1n h\u1ecdc ch\u00ednh nh\u01b0: <\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u1ebfm &amp; \u0110\u1eb7t s\u1ed1<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">D\u00e2n s\u1ed1 &amp; T\u01b0 duy \u0111\u1ea1i s\u1ed1<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">S\u1ed1 v\u00e0 t\u00ednh to\u00e1n s\u1ed1 th\u1eadp ph\u00e2n<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110o l\u01b0\u1eddng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh h\u1ecdc<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Kh\u00f4ng gian &amp; th\u1eddi gian<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">D\u1eef li\u1ec7u &amp; \u0110\u1ed3 th\u1ecb.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/3-nhan-mot-so-voi-mot-hieu.jpg\" alt=\"\u1ee8ng d\u1ee5ng Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef Math gi\u00fap tr\u1ebb h\u1ecdc to\u00e1n t\u1ed1t. (\u1ea2nh: Kh\u1ec9)\" width=\"800\" height=\"500\"><\/p>\n<p dir=\"ltr\">B\u00ean c\u1ea1nh \u0111\u00f3, c\u00e1c b\u00e0i h\u1ecdc \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3ng d\u1ea1y th\u00f4ng qua c\u00e1c tr\u00f2 ch\u01a1i hi\u1ec7n \u0111\u1ea1i. \u0110i\u1ec1u n\u00e0y gi\u00fap tr\u1ebb em th\u00edch h\u1ecdc v\u00e0 d\u1ec5 d\u00e0ng ghi nh\u1edb ki\u1ebfn \u200b\u200bth\u1ee9c. \u0110\u00e2y l\u00e0 l\u1ee3i th\u1ebf n\u1ed5i b\u1eadt m\u00e0 c\u00e1c ph\u01b0\u01a1ng ph\u00e1p gi\u1ea3ng d\u1ea1y truy\u1ec1n th\u1ed1ng kh\u00f4ng c\u00f3.<\/p>\n<p dir=\"ltr\">N\u00f3i chung, khi ph\u1ee5 huynh cho ph\u00e9p tr\u1ebb h\u1ecdc \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc kh\u1ec9, ch\u00fang kh\u00f4ng ch\u1ec9 c\u00f3 th\u1ec3 c\u1ee7ng c\u1ed1 ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 c\u00e1c v\u1ea5n \u0111\u1ec1 to\u00e1n h\u1ecdc l\u1edbp 4 trong m\u1ed9t s\u1ed1, m\u00e0 c\u00f2n \u0111\u1ea1t \u0111\u01b0\u1ee3c nhi\u1ec1u l\u1ee3i \u00edch kh\u00e1c nh\u01b0:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">X\u00e2y d\u1ef1ng m\u1ed9t n\u1ec1n t\u1ea3ng to\u00e1n h\u1ecdc v\u1eefng ch\u1eafc, h\u1ed7 tr\u1ee3 h\u1ecdc t\u1eadp trong l\u1edbp h\u1ecdc m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ph\u00e1t tri\u1ec3n 5 n\u0103ng l\u1ef1c to\u00e1n h\u1ecdc theo ch\u01b0\u01a1ng tr\u00ecnh GDPT m\u1edbi v\u00e0 t\u1ea1o th\u00e0nh th\u00f3i quen suy ngh\u0129 logic t\u1eeb khi c\u00f2n nh\u1ecf cho tr\u1ebb em.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ph\u00e1t tri\u1ec3n \u0111\u1ed3ng b\u1ed9 h\u00f3a t\u01b0 duy v\u00e0 ng\u00f4n ng\u1eef \u0111\u1ec3 gi\u00fap tr\u1ebb h\u1ecdc t\u1ed1t c\u1ea3 to\u00e1n v\u00e0 ti\u1ebfng Anh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ph\u00e1t tri\u1ec3n t\u01b0 duy v\u00e0 tr\u00ed th\u00f4ng minh trong giai \u0111o\u1ea1n ho\u00e0ng kim c\u1ee7a s\u1ef1 ph\u00e1t tri\u1ec3n n\u00e3o b\u1ed9.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">V\u00ec v\u1eady, ph\u1ee5 huynh n\u00ean nhanh ch\u00f3ng t\u1ea3i xu\u1ed1ng \u1ee9ng d\u1ee5ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math v\u00e0 \u0111\u0103ng k\u00fd g\u00f3i \u0111\u1ec3 cho con c\u00e1i c\u01a1 h\u1ed9i ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n v\u1ec1 n\u0103ng l\u1ef1c v\u00e0 t\u01b0 duy to\u00e1n h\u1ecdc. N\u1ebfu b\u1ea1n c\u00f3 b\u1ea5t k\u1ef3 c\u00e2u h\u1ecfi n\u00e0o, xin vui l\u00f2ng \u0111\u1ec3 l\u1ea1i tin nh\u1eafn cho ch\u00fang t\u00f4i \u0111\u1ec3 bi\u1ebft v\u00e0 tr\u1ea3 l\u1eddi s\u1edbm t\u1ea1i Fanpage Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Vi\u1ec7t Nam ho\u1eb7c li\u00ean h\u1ec7 v\u1edbi \u0110\u01b0\u1eddng d\u00e2y n\u00f3ng 1900 6360 52!<\/p>\n<p dir=\"ltr\"><a href=\"https:\/\/www.youtube.com\/watch?v=7DSJPVHFROS\" target=\"_blank\" rel=\"noopener\">https:\/\/www.youtube.com\/watch?v=7DSJPVHFROS<\/a><\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><em>Video gi\u1edbi thi\u1ec7u \u1ee9ng d\u1ee5ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math.<\/em><\/p>\n<table style=\"border-collapse: collapse;margin-left: auto;margin-right: auto;width: 100%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5932%;text-align: center\">Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math &#8211; \u1ee8ng d\u1ee5ng to\u00e1n h\u1ecdc s\u1ed1 1 cho tr\u1ebb m\u1eabu gi\u00e1o &amp; tr\u1ebb em ti\u1ec3u h\u1ecdc. Ph\u1ee5 huynh t\u1ea3i xu\u1ed1ng \u1ee9ng d\u1ee5ng v\u00e0 \u0111\u0103ng k\u00fd g\u00f3i h\u00e0ng ng\u00e0y h\u00f4m nay \u0111\u1ec3 con c\u00e1i h\u1ecd c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o ki\u1ebfn \u200b\u200bth\u1ee9c s\u1edbm v\u00e0 nh\u1eadn \u0111\u01b0\u1ee3c nhi\u1ec1u qu\u00e0 t\u1eb7ng h\u1ea5p d\u1eabn.  <img decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia.monkeyuni.net\/upload\/web\/img\/button_dang-ky-ngay-1.png\" width=\"185\"><\/td>\n<\/tr>\n<\/table>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_van_de_lop_4_nhan_len_mot_so_voi_mot_ten_cho_hoc_sinh_thuc_hanh\"><\/span>M\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 l\u1edbp 4 nh\u00e2n l\u00ean m\u1ed9t s\u1ed1 v\u1edbi m\u1ed9t t\u00ean cho h\u1ecdc sinh th\u1ef1c h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Sau khi b\u1ea1n \u0111\u00e3 n\u1eafm b\u1eaft \u0111\u01b0\u1ee3c ki\u1ebfn \u200b\u200bth\u1ee9c v\u1ec1 c\u00e1c cu\u1ed1n s\u00e1ch to\u00e1n h\u1ecdc l\u1edbp 4 v\u1edbi m\u1ed9t t\u00ean, xin vui l\u00f2ng gi\u1ea3i m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp d\u01b0\u1edbi \u0111\u00e2y \u0111\u1ec3 th\u1ef1c h\u00e0nh c\u00e1c k\u1ef9 n\u0103ng b\u00e0i t\u1eadp v\u1ec1 nh\u00e0 t\u1ed1t h\u01a1n.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/4-nhan-mot-so-voi-mot-hieu.jpg\" alt=\"Th\u1ef1c h\u00e0nh 4 -Core To\u00e1n to\u00e1n v\u1edbi m\u1ed9t t\u00ean. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"800\" height=\"500\"><\/p>\n<p dir=\"ltr\">\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Giai_quyet_cac_bai_toan_lop_4_voi_mot_so_trang_67_68_sach_giao_khoa\"><\/span>Gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i to\u00e1n l\u1edbp 4 v\u1edbi m\u1ed9t s\u1ed1 trang 67, 68 s\u00e1ch gi\u00e1o khoa<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">C\u00e2u 1: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c v\u00e0 sau \u0111\u00f3 ghi v\u00e0o h\u1ed9p (theo bi\u1ec3u m\u1eabu)<\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #fff4f5;border-style: solid\">\n<tr>\n<td style=\"text-align: center;background-color: #e03e2d\">\n<p dir=\"ltr\">M\u1ed8T<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #e03e2d\">\n<p dir=\"ltr\">B<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #e03e2d\">\n<p dir=\"ltr\">C<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #e03e2d\">\n<p dir=\"ltr\">A \u00d7 (B &#8211; C)<\/p>\n<\/td>\n<td style=\"text-align: center;background-color: #e03e2d\">\n<p dir=\"ltr\">A \u00d7 b &#8211; a \u00d7 c<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">3<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">7<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">3<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">3 \u00d7 (7 &#8211; 3) = 12<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">3 \u00d7 7 &#8211; 3 \u00d7 3 = 12<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">6<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">9<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">5<\/p>\n<\/td>\n<td style=\"text-align: center\"> <\/td>\n<td style=\"text-align: center\"> <\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">8<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">5<\/p>\n<\/td>\n<td style=\"text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"text-align: center\"> <\/td>\n<td style=\"text-align: center\"> <\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">Tr\u1ea3 l\u1eddi:<\/p>\n<table style=\"border-collapse: collapse;width: 100%\">\n<tr>\n<td style=\"background-color: #e03e2d;text-align: center\">\n<p dir=\"ltr\">M\u1ed8T<\/p>\n<\/td>\n<td style=\"background-color: #e03e2d;text-align: center\">\n<p dir=\"ltr\">B<\/p>\n<\/td>\n<td style=\"background-color: #e03e2d;text-align: center\">\n<p dir=\"ltr\">C<\/p>\n<\/td>\n<td style=\"background-color: #e03e2d;text-align: center\">\n<p dir=\"ltr\">A \u00d7 (B &#8211; C)<\/p>\n<\/td>\n<td style=\"background-color: #e03e2d;text-align: center\">\n<p dir=\"ltr\">A \u00d7 b &#8211; a \u00d7 c<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">3<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">7<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">3<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">3 \u00d7 (7 &#8211; 3) = 12<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">3 \u00d7 7 &#8211; 3 \u00d7 3 = 12<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">6<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">9<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">5<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">6 \u00d7 (9 &#8211; 5) = 24<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">6 \u00d7 9 &#8211; 6 \u00d7 5 = 24<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">8<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">5<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">2<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">8 \u00d7 (5 &#8211; 2) = 24<\/p>\n<\/td>\n<td style=\"background-color: #fff4f5;text-align: center\">\n<p dir=\"ltr\">8 \u00d7 5 &#8211; 8 \u00d7 2 = 24<\/p>\n<\/td>\n<\/tr>\n<\/table>\n<p dir=\"ltr\">C\u00e2u 2: \u00c1p d\u1ee5ng c\u00e1c thu\u1ed9c t\u00ednh nh\u00e2n l\u00ean t\u00edn hi\u1ec7u \u0111\u1ec3 t\u00ednh to\u00e1n (theo m\u1eabu):<\/p>\n<p dir=\"ltr\">M\u1eabu: 26 \u00d7 9 = 26 \u00d7 (10 &#8211; 1) = 26 \u00d7 10 &#8211; 26 \u00d7 1 = 260 &#8211; 26 = 234<\/p>\n<p dir=\"ltr\">M\u1ed9t)<\/p>\n<p dir=\"ltr\">47 \u00d7 9<\/p>\n<p dir=\"ltr\">24 \u00d7 99<\/p>\n<p dir=\"ltr\">b) <\/p>\n<p dir=\"ltr\">138 \u00d7 9<\/p>\n<p dir=\"ltr\">123 \u00d7 99<\/p>\n<p dir=\"ltr\">Ph\u00e2n c\u00f4ng:<\/p>\n<p dir=\"ltr\">M\u1ed9t) <\/p>\n<p dir=\"ltr\">47 \u00d7 9 = 47 \u00d7 (10 -1) = 47 \u00d7 10 &#8211; 47 \u00d7 1 = 470 &#8211; 47 = 423<\/p>\n<p dir=\"ltr\">24 \u00d7 99 = 24 \u00d7 (100 &#8211; 1) = 24 \u00d7 100 &#8211; 24 \u00d7 1 = 2400 &#8211; 24 = 2376<\/p>\n<p dir=\"ltr\">b) <\/p>\n<p dir=\"ltr\">138 \u00d7 9 = 138 \u00d7 (10 &#8211; 1) = 138 \u00d7 10 &#8211; 138 \u00d7 1 = 1380 &#8211; 138 = 1242<\/p>\n<p dir=\"ltr\">123 \u00d7 99 = 123 \u00d7 (100 &#8211; 1) = 123 \u00d7 100 &#8211; 123 \u00d7 1 = 12300 &#8211; 123 = 12177<\/p>\n<p dir=\"ltr\">C\u00e2u 3: M\u1ed9t c\u1eeda h\u00e0ng b\u00e1n tr\u1ee9ng c\u00f3 40 gi\u00e1 cho tr\u1ee9ng, m\u1ed7i gi\u00e1 cho tr\u1ee9ng c\u00f3 175 tr\u00e1i c\u00e2y. C\u1eeda h\u00e0ng \u0111\u00e3 b\u00e1n \u0111\u01b0\u1ee3c 10 gi\u00e1 tr\u1ee9ng. H\u1ecfi c\u00f3 bao nhi\u00eau qu\u1ea3 tr\u1ee9ng c\u00f2n l\u1ea1i c\u1eeda h\u00e0ng?<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">Ph\u00e2n c\u00f4ng<\/p>\n<p dir=\"ltr\">C\u00f3 2 c\u00e1ch \u0111\u1ec3 gi\u1ea3i b\u00e0i t\u1eadp n\u00e0y nh\u01b0 sau:<\/p>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p 1:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">C\u1eeda h\u00e0ng c\u00f3 t\u1ea5t c\u1ea3:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">175 \u00d7 40 = 7000 (tr\u1ee9ng)<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">C\u1eeda h\u00e0ng \u0111\u00e3 b\u00e1n:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">175 \u00d7 10 = 1750 (tr\u1ee9ng)<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">C\u1eeda h\u00e0ng c\u00f2n l\u1ea1i:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">7000 &#8211; 1750 = 5250 (tr\u1ee9ng)<\/p>\n<p dir=\"ltr\">Ph\u01b0\u01a1ng ph\u00e1p 2:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">Gi\u00e1 tr\u1ee9ng c\u00f2n l\u1ea1i l\u00e0:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">40 &#8211; 10 = 30 (m\u1ea3nh)<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">Tr\u1ee9ng c\u00f2n l\u1ea1i c\u1ee7a c\u1eeda h\u00e0ng l\u00e0:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">175 \u00d7 30 = 5250 (tr\u1ee9ng)<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">Tr\u1ea3 l\u1eddi: 5250 tr\u1ee9ng<\/p>\n<p dir=\"ltr\">C\u00e2u 4: T\u00ednh v\u00e0 so s\u00e1nh gi\u00e1 tr\u1ecb c\u1ee7a hai bi\u1ec3u th\u1ee9c:<\/p>\n<p dir=\"ltr\">(7 &#8211; 5) \u00d7 3 v\u00e0 7 \u00d7 3 &#8211; 5 \u00d7 3<\/p>\n<p dir=\"ltr\">T\u1eeb k\u1ebft qu\u1ea3 so s\u00e1nh v\u00e0 n\u00eau c\u00e1ch nh\u00e2n m\u1ed9t th\u01b0\u01a1ng hi\u1ec7u v\u1edbi m\u1ed9t s\u1ed1.<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">Ph\u00e2n c\u00f4ng<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">Ch\u00fang t\u00f4i c\u00f3: <\/p>\n<p dir=\"ltr\" style=\"text-align: center\">(7 -5) \u00d7 3 = 2 \u00d7 3 = 6<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">7 \u00d7 3 &#8211; 5 \u00d7 3 = 21 &#8211; 15 = 6<\/p>\n<p dir=\"ltr\">=&gt; Hai bi\u1ec3u th\u1ee9c c\u00f3 gi\u00e1 tr\u1ecb b\u1eb1ng nhau, ho\u1eb7c: (7 -5) \u00d7 3 = 7 \u00d7 3 -5 \u00d7 3<\/p>\n<p dir=\"ltr\">Khi nh\u00e2n m\u1ed9t s\u1ed1 s\u1ed1 v\u1edbi m\u1ed9t s\u1ed1 ch\u00fang t\u00f4i c\u00f3 th\u1ec3 bi\u1ebfn s\u1ed1 l\u01b0\u1ee3ng \u0111\u01b0\u1ee3c kh\u1ea5u tr\u1eeb, s\u1ed1 \u0111\u01b0\u1ee3c tr\u1eeb v\u1edbi s\u1ed1 v\u00e0 sau \u0111\u00f3 kh\u1ea5u tr\u1eeb hai k\u1ebft qu\u1ea3 cho nhau.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_the_nhan_len_mot_so_voi_toan_hoc_lop_4_de_ho_tu_thuc_hanh\"><\/span>M\u1ed9t s\u1ed1 th\u1ebb nh\u00e2n l\u00ean m\u1ed9t s\u1ed1 v\u1edbi to\u00e1n h\u1ecdc l\u1edbp 4 \u0111\u1ec3 h\u1ecd t\u1ef1 th\u1ef1c h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Ti\u00eau \u0111\u1ec1 1:<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/5-nhan-mot-so-voi-mot-hieu.jpg\" alt=\"\" width=\"800\" height=\"600\"><\/p>\n<p dir=\"ltr\">Ti\u00eau \u0111\u1ec1 2:<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/6-nhan-mot-so-voi-mot-hieu.jpg\" alt=\"\" width=\"800\" height=\"1050\"><\/p>\n<p dir=\"ltr\">Do \u0111\u00f3, b\u00e0i vi\u1ebft n\u00e0y, kh\u1ec9 \u0111\u00e3 gi\u00fap h\u1ecd n\u1eafm b\u1eaft ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc c\u1ea5p 4 c\u1ee7a m\u1ed9t s\u1ed1 ng\u01b0\u1eddi c\u00f3 m\u1ed9t. \u0110\u1eebng qu\u00ean theo d\u00f5i trang web kh\u1ec9.edu.vn v\u00e0 nghi\u00ean c\u1ee9u \u1ee9ng d\u1ee5ng to\u00e1n h\u1ecdc kh\u1ec9 m\u1ed7i ng\u00e0y \u0111\u1ec3 h\u1ecdc to\u00e1n t\u1ed1t h\u01a1n.<\/p>\n<table style=\"border-collapse: collapse;margin-left: auto;margin-right: auto;width: 100%;background-color: #fbeeb8\" border=\"1\">\n<tr>\n<td style=\"width: 98.5932%;background-color: #2dc26b;text-align: center\">Cha m\u1eb9 kh\u00f4ng b\u1ecf l\u1ee1 c\u01a1 h\u1ed9i gi\u00fap tr\u1ebb nh\u1edb h\u01a1n 10.000 t\u1eeb v\u1ef1ng ti\u1ebfng Anh ch\u1ec9 v\u1edbi 15 ph\u00fat c\u1ee7a con kh\u1ec9 m\u1ed7i ng\u00e0y.  <img decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia.monkeyuni.net\/upload\/web\/img\/nhantuvanmienphi.png\" width=\"185\"><\/td>\n<\/tr>\n<\/table>\n<p>Xem th\u00eam:<\/p>\n<ul>\n<li>C\u00e1ch gi\u1ea3i 4 b\u00e0i t\u1eadp to\u00e1n h\u1ecdc v\u1edbi m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp d\u1ec5 nh\u1ea5t cho em b\u00e9 c\u1ee7a b\u1ea1n<\/li>\n<li>T\u00f3m t\u1eaft ki\u1ebfn \u200b\u200bth\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 c\u00e1c thu\u1ed9c t\u00ednh to\u00e1n h\u1ecdc<\/li>\n<li>Top 10 tr\u00f2 ch\u01a1i tr\u00ed tu\u1ec7 cho tr\u1ebb em 8 tu\u1ed5i n\u00ean bi\u1ebft<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Trong b\u00e0i h\u1ecdc to\u00e1n l\u1edbp 4 tr\u01b0\u1edbc \u0111\u00f3, h\u1ecd \u0111\u00e3 l\u00e0m quen v\u1edbi h\u00ecnh th\u1ee9c b\u00e0i t\u1eadp nh\u00e2n v\u1edbi m\u1ed9t kho\u1ea3n ti\u1ec1n. T\u01b0\u01a1ng t\u1ef1 nh\u01b0 v\u1eady trong b\u00e0i h\u1ecdc n\u00e0y, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd ti\u1ebfp t\u1ee5c h\u01b0\u1edbng d\u1eabn h\u1ecd h\u1ecdc c\u00e1ch gi\u1ea3i t\u1eadp c\u00e1c b\u00e0i t\u1eadp nh\u00e2n v\u1edbi m\u1ed9t th\u01b0\u01a1ng hi\u1ec7u&#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-14880","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14880","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=14880"}],"version-history":[{"count":1,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14880\/revisions"}],"predecessor-version":[{"id":17836,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14880\/revisions\/17836"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=14880"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=14880"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=14880"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}