{"id":14279,"date":"2025-06-07T14:09:45","date_gmt":"2025-06-07T07:09:45","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=14279"},"modified":"2025-07-04T12:30:35","modified_gmt":"2025-07-04T05:30:35","slug":"huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c l\u1edbp 4 chi ti\u1ebft 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\/huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat\/#Quy_tac_tinh_gia_tri_bieu_thuc_trong_toan_lop_4\" >Quy t\u1eafc t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c trong to\u00e1n 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\/huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat\/#Cac_dang_bai_tap_tinh_gia_tri_bieu_thuc_lop_4_pho_bien\" >C\u00e1c d\u1ea1ng b\u00e0i t\u1eadp t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c l\u1edbp 4 ph\u1ed5 bi\u1ebfn<\/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\/huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat\/#Dang_1_Nhom_cac_so_hang_trong_bieu_thuc_thanh_nhom_co_tonghieu_la_nhung_so_tron_chuctramngan%E2%80%A6_roi_congtru_ket_qua\" >D\u1ea1ng 1: Nh\u00f3m c\u00e1c s\u1ed1 h\u1ea1ng trong bi\u1ec3u th\u1ee9c th\u00e0nh nh\u00f3m c\u00f3 t\u1ed5ng\/hi\u1ec7u l\u00e0 nh\u1eefng s\u1ed1 tr\u00f2n ch\u1ee5c\/tr\u0103m\/ng\u00e0n\u2026 r\u1ed3i c\u1ed9ng\/tr\u1eeb k\u1ebft qu\u1ea3.<\/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\/huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat\/#Dang_2_Ap_dung_tinh_chat_mot_so_nhan_voi_mot_tong_mot_so_nhan_voi_mot_hieu_mot_tong_chia_cho_mot_so%E2%80%A6\" >D\u1ea1ng 2: \u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t m\u1ed9t s\u1ed1 nh\u00e2n v\u1edbi m\u1ed9t t\u1ed5ng, m\u1ed9t s\u1ed1 nh\u00e2n v\u1edbi m\u1ed9t hi\u1ec7u, m\u1ed9t t\u1ed5ng chia cho m\u1ed9t s\u1ed1\u2026.<\/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\/huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat\/#Dang_3_Ap_dung_mot_so_kien_thuc_ve_day_so_de_co_the_tinh_duoc_gia_tri_bieu_theo_mot_cach_thuan_loi_nhat\" >D\u1ea1ng 3: \u00c1p d\u1ee5ng m\u1ed9t s\u1ed1 ki\u1ebfn th\u1ee9c v\u1ec1 d\u00e3y s\u1ed1 \u0111\u1ec3 c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb bi\u1ec3u theo m\u1ed9t c\u00e1ch thu\u1eadn l\u1ee3i nh\u1ea5t.<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat\/#Bai_tap_tinh_gia_tri_bieu_thuc_toan_lop_4_van_dung\" >B\u00e0i t\u1eadp t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c to\u00e1n l\u1edbp 4 v\u1eadn d\u1ee5ng<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat\/#Bai_tap_co_loi_giai\" >B\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i<\/a><\/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\/huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat\/#Bai_tap_van_dung\" >B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat\/#Bi_quyet_hoc_toan_lop_4_tinh_gia_tri_bieu_thuc_hieu_qua\" >B\u00ed quy\u1ebft h\u1ecdc to\u00e1n l\u1edbp 4 t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c hi\u1ec7u qu\u1ea3<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/huong-dan-giai-bai-tap-tinh-gia-tri-bieu-thuc-lop-4-chi-tiet-nhat\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>T\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c l\u1edbp 4 l\u00e0 m\u1ed9t trong nh\u1eefng chuy\u00ean \u0111\u1ec1 quan tr\u1ecdng, th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n trong c\u00e1c \u0111\u1ec1 thi to\u00e1n, c\u0169ng nh\u01b0 \u1ee9ng d\u1ee5ng trong th\u1ef1c ti\u1ec5n. V\u1eady n\u00ean, \u0111\u1ec3 gi\u00fap c\u00e1c em chinh ph\u1ee5c \u0111\u01b0\u1ee3c d\u1ea1ng to\u00e0n n\u00e0y, n\u1ed9i dung sau \u0111\u00e2y Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd ph\u00e2n t\u00edch chi ti\u1ebft.<\/p>\n<p>                        View all<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Quy_tac_tinh_gia_tri_bieu_thuc_trong_toan_lop_4\"><\/span>Quy t\u1eafc t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c trong to\u00e1n l\u1edbp 4<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Bi\u1ec3u th\u1ee9c ch\u00ednh l\u00e0 c\u00e1c s\u1ed1 \u0111\u01b0\u1ee3c n\u1ed1i v\u1edbi nhau th\u00f4ng qua c\u00e1c ph\u00e9p t\u00ednh nh\u01b0 c\u1ed9ng, tr\u1eeb, nh\u00e2n, chia. C\u00f2n gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c ch\u00ednh l\u00e0 k\u1ebft qu\u1ea3 m\u00e0 ta t\u00ednh \u0111\u01b0\u1ee3c sau khi th\u1ef1c hi\u1ec7n ch\u00ednh x\u00e1c c\u00e1c ph\u00e9p t\u00ednh trong bi\u1ec3u th\u1ee9c \u0111\u00f3.<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><\/p>\n<p dir=\"ltr\">Trong to\u00e1n h\u1ecdc, quy t\u1eafc t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c s\u1ebd bao g\u1ed3m:<\/p>\n<p dir=\"ltr\">Quy t\u1eafc 1: Trong m\u1ed9t bi\u1ec3u th\u1ee9c, n\u1ebfu ch\u1ec9 c\u00f3 ph\u00e9p c\u1ed9ng v\u00e0 tr\u1eeb ho\u1eb7c nh\u00e2n v\u00e0 chia, ta th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh theo quy t\u1eafc t\u1eeb tr\u00e1i sang ph\u1ea3i.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: 1234 + 4567<\/em><\/p>\n<p dir=\"ltr\"><em>Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh theo th\u1ee9 t\u1ef1 t\u1eeb ph\u1ea3i qua tr\u00e1i ta c\u00f3:<\/em><\/p>\n<p dir=\"ltr\"><em>1 c\u1ed9ng 4 b\u1eb1ng 5, vi\u1ebft 5<\/em><\/p>\n<p dir=\"ltr\"><em>2 c\u1ed9ng 5 b\u1eb1ng 7, vi\u1ebft 7<\/em><\/p>\n<p dir=\"ltr\"><em>3 c\u1ed9ng 6 b\u1eb1ng 9, vi\u1ebft 9<\/em><\/p>\n<p dir=\"ltr\"><em>4 c\u1ed9ng 7 b\u1eb1ng 11, vi\u1ebft 11<\/em><\/p>\n<p dir=\"ltr\"><em>K\u1ebft qu\u1ea3 gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c 1234 + 4567 = 57911<\/em><\/p>\n<p dir=\"ltr\">Quy t\u1eafc 2: Trong m\u1ed9t bi\u1ec3u th\u1ee9c n\u1ebfu c\u00f3 ch\u1ee9a d\u1ea5u ngo\u1eb7c tr\u00f2n (), ta s\u1ebd ph\u1ea3i th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh trong ngo\u1eb7c tr\u01b0\u1edbc, sau \u0111\u00f3 th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh ngo\u00e0i ngo\u1eb7c. Tr\u01b0\u1eddng h\u1ee3p bi\u1ec3u th\u1ee9c c\u00f3 nhi\u1ec1u lo\u1ea1i d\u1ea5u ngo\u1eb7c th\u00ec d\u1ea5u ngo\u1eb7c tr\u00f2n () \u01b0u ti\u00ean t\u00ednh tr\u01b0\u1edbc, r\u1ed3i \u0111\u1ebfn ngo\u1eb7c vu\u00f4ng [] v\u00e0 cu\u1ed1i c\u00f9ng m\u1edbi t\u1edbi ngo\u1eb7c nh\u1ecdn {}.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5:\u00a0<\/em><\/p>\n<p dir=\"ltr\"><em>T\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c: 60320 \u2013 (32578 + 17020)<\/em><\/p>\n<p dir=\"ltr\"><em>= 60320 \u2013 49598 = 10722\u00a0<\/em><\/p>\n<p dir=\"ltr\">Quy t\u1eafc 3: Trong bi\u1ec3u th\u1ee9c g\u1ed3m c\u00e1c ph\u00e9p t\u00ednh c\u1ed9ng, tr\u1eeb, nh\u00e2n, chia ta s\u1ebd \u01b0u ti\u00ean th\u1ef1c hi\u1ec7n theo quy t\u1eafc \u201cnh\u00e2n, chia tr\u01b0\u1edbc \u2013 c\u1ed9ng, tr\u1eeb sau\u201d.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c: 134415 \u2013 134415 : 45 = 134415 \u2013 2987 = 131428<\/em><\/p>\n<p dir=\"ltr\">G\u1ee3i \u00fd ph\u01b0\u01a1ng ph\u00e1p t\u00ednh nhanh cho bi\u1ec3u th\u1ee9c c\u00f3 ph\u00e9p c\u1ed9ng:<\/p>\n<ul>\n<li dir=\"ltr\">N\u00ean nh\u00f3m nh\u1eefng s\u1ed1 h\u1ea1ng \u1edf bi\u1ec3u th\u1ee9c th\u00e0nh nh\u00f3m c\u00f3 t\u1ed5ng l\u00e0 c\u00e1c s\u1ed1 tr\u00f2n ch\u1ee5c\/tr\u0103m\/ng\u00e0n \u0111\u1ec3 d\u1ec5 t\u00ednh to\u00e1n h\u01a1n.<\/li>\n<li dir=\"ltr\">\u00c1p d\u1ee5ng\u00a0t\u00ednh ch\u1ea5t k\u1ebft h\u1ee3p c\u1ee7a ph\u00e9p c\u1ed9ng v\u1edbi c\u00f4ng th\u1ee9c t\u1ed5ng qu\u00e1t: a + b + c = a + c + b = c + a + b \u0111\u1ec3 t\u00ednh to\u00e1n ch\u00ednh x\u00e1c.<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_dang_bai_tap_tinh_gia_tri_bieu_thuc_lop_4_pho_bien\"><\/span>C\u00e1c d\u1ea1ng b\u00e0i t\u1eadp t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c l\u1edbp 4 ph\u1ed5 bi\u1ebfn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n l\u1edbp 4, c\u00e1c em th\u01b0\u1eddng s\u1ebd g\u1eb7p m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1ec1 t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c nh\u01b0 sau:<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/tinh-gia-tri-bieu-thuc-lop-4-1a.jpg\" alt=\"C\u1ea7n n\u1eafm r\u00f5 quy t\u1eafc khi th\u1ef1c hi\u1ec7n gi\u1ea3i b\u00e0i t\u1eadp t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_1_Nhom_cac_so_hang_trong_bieu_thuc_thanh_nhom_co_tonghieu_la_nhung_so_tron_chuctramngan%E2%80%A6_roi_congtru_ket_qua\"><\/span>D\u1ea1ng 1: Nh\u00f3m c\u00e1c s\u1ed1 h\u1ea1ng trong bi\u1ec3u th\u1ee9c th\u00e0nh nh\u00f3m c\u00f3 t\u1ed5ng\/hi\u1ec7u l\u00e0 nh\u1eefng s\u1ed1 tr\u00f2n ch\u1ee5c\/tr\u0103m\/ng\u00e0n\u2026 r\u1ed3i c\u1ed9ng\/tr\u1eeb k\u1ebft qu\u1ea3.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ednh nhanh bi\u1ec3u th\u1ee9c 349 + 602 + 651 + 398<\/em><\/p>\n<p dir=\"ltr\"><em>L\u1eddi gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>349 + 602 + 651 + 398<\/em><\/p>\n<p dir=\"ltr\"><em>= (346 + 651 ) + (602 + 398)<\/em><\/p>\n<p dir=\"ltr\"><em>= 1000 + 1000<\/em><\/p>\n<p dir=\"ltr\"><em>= 2000<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_2_Ap_dung_tinh_chat_mot_so_nhan_voi_mot_tong_mot_so_nhan_voi_mot_hieu_mot_tong_chia_cho_mot_so%E2%80%A6\"><\/span>D\u1ea1ng 2: \u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t m\u1ed9t s\u1ed1 nh\u00e2n v\u1edbi m\u1ed9t t\u1ed5ng, m\u1ed9t s\u1ed1 nh\u00e2n v\u1edbi m\u1ed9t hi\u1ec7u, m\u1ed9t t\u1ed5ng chia cho m\u1ed9t s\u1ed1\u2026.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c 19 \u00d7 82 + 18 \u00d7 19<\/em><\/p>\n<p dir=\"ltr\"><em>L\u1eddi gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>19 \u00d7 82 + 18 \u00d7 19<\/em><\/p>\n<p dir=\"ltr\"><em>= 19 \u00d7 ( 82 + 18)<\/em><\/p>\n<p dir=\"ltr\"><em>= 19 \u00d7 100<\/em><\/p>\n<p dir=\"ltr\"><em>= 1900<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_3_Ap_dung_mot_so_kien_thuc_ve_day_so_de_co_the_tinh_duoc_gia_tri_bieu_theo_mot_cach_thuan_loi_nhat\"><\/span>D\u1ea1ng 3: \u00c1p d\u1ee5ng m\u1ed9t s\u1ed1 ki\u1ebfn th\u1ee9c v\u1ec1 d\u00e3y s\u1ed1 \u0111\u1ec3 c\u00f3 th\u1ec3 t\u00ednh \u0111\u01b0\u1ee3c gi\u00e1 tr\u1ecb bi\u1ec3u theo m\u1ed9t c\u00e1ch thu\u1eadn l\u1ee3i nh\u1ea5t.<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\" style=\"text-align: center\">C\u00f4ng th\u1ee9c: S\u1ed1 c\u00e1c s\u1ed1 h\u1ea1ng = (S\u1ed1 h\u1ea1ng cu\u1ed1i &#8211; s\u1ed1 h\u1ea1ng \u0111\u1ea7u) : kho\u1ea3ng c\u00e1ch + 1<\/p>\n<p dir=\"ltr\">Sau khi ta t\u00ecm \u0111\u01b0\u1ee3c s\u1ed1 h\u1ea1ng c\u1ee7a c\u1ee7a bi\u1ec3u th\u1ee9c v\u1edbi d\u00e3y s\u1ed1 c\u00e1ch \u0111\u1ec1u th\u00ec c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n t\u00ednh nhanh t\u1ed5ng nh\u1eefng d\u00e3y s\u1ed1 \u0111\u00f3 theo c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<ul>\n<li dir=\"ltr\">B\u01b0\u1edbc 1: T\u00ecm s\u1ed1 s\u1ed1 h\u1ea1ng t\u01b0\u01a1ng \u1ee9ng c\u1ee7a d\u00e3y s\u1ed1 \u0111\u00e3 cho.<\/li>\n<li dir=\"ltr\">B\u01b0\u1edbc 2: Th\u1ef1c hi\u1ec7n t\u00ednh s\u1ed1 c\u1eb7p c\u00f3 th\u1ec3 t\u1ea1o n\u00ean t\u1eeb nh\u1eefng s\u1ed1 h\u1ea1ng \u0111\u00f3 (l\u1ea5y s\u1ed1 c\u00e1c s\u1ed1 h\u1ea1ng chia cho 2).<\/li>\n<li dir=\"ltr\">B\u01b0\u1edbc 3: Nh\u00f3m nh\u1eefng s\u1ed1 h\u1ea1ng th\u00e0nh t\u1eebng nh\u00f3m, th\u01b0\u1eddng nh\u00f3m s\u1ed1 h\u1ea1ng \u0111\u1ea7u v\u1edbi cu\u1ed1i d\u00e3y s\u1ed1, c\u1ee9 l\u1ea7n l\u01b0\u1ee3t th\u1ef1c hi\u1ec7n cho \u0111\u1ebfn h\u1ebft.<\/li>\n<li dir=\"ltr\">B\u01b0\u1edbc 4: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a t\u1eebng c\u1eb7p s\u1ed1 ( c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a t\u1eebng c\u1eb7p l\u00e0 b\u1eb1ng nhau)<\/li>\n<li dir=\"ltr\">B\u01b0\u1edbc 5: Th\u1ef1c hi\u1ec7n t\u00ednh t\u1ed5ng d\u00e3y s\u1ed1 b\u1eb1ng c\u00e1ch l\u1ea5y s\u1ed1 c\u1eb7p nh\u00e2n v\u1edbi gi\u00e1 tr\u1ecb t\u01b0\u01a1ng \u1ee9ng c\u1ee7a m\u1ed9t c\u1eb7p.<\/li>\n<\/ul>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ednh t\u1ed5ng c\u1ee7a c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean t\u1eeb 1 \u0111\u1ebfn 100.<\/em><\/p>\n<p dir=\"ltr\"><em>L\u1eddi gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>D\u00e3y s\u1ed1 t\u1ef1 nhi\u00ean t\u1eeb 1 \u0111\u1ebfn 100 c\u00f3 s\u1ed1 c\u00e1c s\u1ed1 h\u1ea1ng l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>(100 &#8211; 1 ) : 1 + 1 = 100 (s\u1ed1)<\/em><\/p>\n<p dir=\"ltr\"><em>100 s\u1ed1 t\u1ea1o th\u00e0nh s\u1ed1 c\u1eb7p l\u00e0:<\/em><\/p>\n<p dir=\"ltr\"><em>100 : 2 = 50 (c\u1eb7p)<\/em><\/p>\n<p dir=\"ltr\"><em>Ta c\u00f3: 1 + 2 + 3 + 4 + 5 +&#8230;&#8230;&#8230;.. + 96 + 97 + 98 + 99 + 100<\/em><\/p>\n<p dir=\"ltr\"><em>= (1 + 100) + (2 + 99) + (3 + 98)<\/em><\/p>\n<p dir=\"ltr\"><em>+ (4 + 97) + (5 + 96) +&#8230;..<\/em><\/p>\n<p dir=\"ltr\"><em>= 101 + 101 + 101 + 101<\/em><\/p>\n<p dir=\"ltr\"><em>+101 +&#8230;&#8230; 101<\/em><\/p>\n<p dir=\"ltr\"><em>= 101 \u00d7 50 = 5050<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_tinh_gia_tri_bieu_thuc_toan_lop_4_van_dung\"><\/span>B\u00e0i t\u1eadp t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c to\u00e1n l\u1edbp 4 v\u1eadn d\u1ee5ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd t\u1ed5ng h\u1ee3p m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1ec1 t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c l\u1edbp 4 \u0111\u1ec3 c\u00e1c e tham kh\u1ea3o th\u00eam:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_co_loi_giai\"><\/span>B\u00e0i t\u1eadp c\u00f3 l\u1eddi gi\u1ea3i<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 1: T\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c sau:<\/p>\n<p dir=\"ltr\">a) 16 + 4748 + 142 -183<\/p>\n<p dir=\"ltr\">b) 472819 + 174 \u2013 19 x 98<\/p>\n<p dir=\"ltr\">c) 5647 \u2013 18 + 1874 : 2<\/p>\n<p dir=\"ltr\">d) 87 x 192 \u2013 216 : 6<\/p>\n<p dir=\"ltr\">\u2013 H\u01b0\u1edbng d\u1eabn gi\u1ea3i:<\/p>\n<p dir=\"ltr\">Th\u1ef1c hi\u1ec7n theo quy t\u1eafc c\u1ee7a ph\u00e9p nh\u00e2n, chia, c\u1ed9ng tr\u1eeb. Ta c\u00f3:<\/p>\n<p dir=\"ltr\">a) 16 + 4748 + 142 \u2013 183 = (4748 + 142) \u2013 183 + 16 = 4890 \u2013 167 = 4723<\/p>\n<p dir=\"ltr\">b) 472819 + 174 \u2013 19 x 98 = 472819 + 174 \u2013 1862 = 471131<\/p>\n<p dir=\"ltr\">c) 5647 \u2013 18 + 1874 : 2 = 5629 + 937 = 6566<\/p>\n<p dir=\"ltr\">d) 87 x 192 \u2013 216 : 6 = 16704 \u2013 36 = 16668<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 2: T\u00ecm Y bi\u1ebft:<\/p>\n<p dir=\"ltr\">a) y x 5 = 1948 + 247<\/p>\n<p dir=\"ltr\">b) y : 3 = 190 \u2013 90<\/p>\n<p dir=\"ltr\">c) y \u2013 8357 = 3829 x 2<\/p>\n<p dir=\"ltr\">d) y x 8 = 182 x 4<\/p>\n<p dir=\"ltr\">\u2013 H\u01b0\u1edbng d\u1eabn gi\u1ea3i:<\/p>\n<p dir=\"ltr\">a) y x 5 = 1948 + 247<\/p>\n<p dir=\"ltr\">y x 5 = 2195<\/p>\n<p dir=\"ltr\">y = 2195 : 5<\/p>\n<p dir=\"ltr\">y = 439\u00a0<\/p>\n<p dir=\"ltr\">b) y : 3 = 190 \u2013 90<\/p>\n<p dir=\"ltr\">y : 3 = 100<\/p>\n<p dir=\"ltr\">y = 100 x 3<\/p>\n<p dir=\"ltr\">y = 300\u00a0<\/p>\n<p dir=\"ltr\">c) y \u2013 8357 = 3829 x 2<\/p>\n<p dir=\"ltr\">y \u2013 8357 = 7658<\/p>\n<p dir=\"ltr\">y = 7658 + 8357<\/p>\n<p dir=\"ltr\">y = 16015<\/p>\n<p dir=\"ltr\">d) y x 8 = 182 x 4<\/p>\n<p dir=\"ltr\">y x 8 = 728<\/p>\n<p dir=\"ltr\">y = 728 : 8<\/p>\n<p dir=\"ltr\">y = 91<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 3: T\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c theo c\u00e1ch thu\u1eadn ti\u1ec7n nh\u1ea5t.<\/p>\n<p dir=\"ltr\">a) 103 + 91 + 47 + 9<\/p>\n<p dir=\"ltr\">b) 261 + 192 \u2013 11 + 8<\/p>\n<p dir=\"ltr\">c) 915 + 832 \u2013 45 + 48\u00a0<\/p>\n<p dir=\"ltr\">d) 1845 \u2013 492 \u2013 45 \u2013 92<\/p>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i:\u00a0<\/p>\n<p dir=\"ltr\">Th\u1ef1c hi\u1ec7n theo quy t\u1eafc c\u1ee7a bi\u1ec3u th\u1ee9c c\u00f3 ch\u1ee9a ph\u00e9p c\u1ed9ng, tr\u1eeb ta c\u00f3:<\/p>\n<p dir=\"ltr\">a) 103 + 91 + 47 + 9 = (103 + 47) + (91 + 9) = 150 + 100 = 250<\/p>\n<p dir=\"ltr\">b) 261 + 192 \u2013 11 + 8 = (261 \u2013 11) + (192 + 8) = 250 + 200 = 450<\/p>\n<p dir=\"ltr\">c) 915 + 832 \u2013 45 + 48 = (915 \u2013 45) + (832 + 48) = 870 + 880 = 1750<\/p>\n<p dir=\"ltr\">d) 1845 \u2013 492 \u2013 45 \u2013 8 = (1845 \u2013 45) \u2013 (492 +8) = 1800 \u2013 500 = 1300<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 4: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a ph\u00e9p t\u00ednh sau:\u00a0<\/p>\n<p dir=\"ltr\">a) 1245 + 2837<\/p>\n<p dir=\"ltr\">b) 2021 + 194857\u00a0<\/p>\n<p dir=\"ltr\">c) 198475 \u2013 28734<\/p>\n<p dir=\"ltr\">d) 987643 \u2013 2732<\/p>\n<p dir=\"ltr\">\u0110\u1eb7t t\u00ednh v\u00e0 t\u00ednh, c\u00e1c ch\u1eef s\u1ed1 \u0111\u1eb7t th\u1eb3ng h\u00e0ng v\u1edbi nhau. Th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh t\u1eeb ph\u1ea3i qua tr\u00e1i. Ta c\u00f3:<\/p>\n<p dir=\"ltr\">a)<\/p>\n<p dir=\"ltr\">7 c\u1ed9ng 5 b\u1eb1ng 12, vi\u1ebft 2 nh\u1edb 1<\/p>\n<p dir=\"ltr\">3 c\u1ed9ng 4 b\u1eb1ng 7 th\u00eam 1 b\u1eb1ng 8, vi\u1ebft 8<\/p>\n<p dir=\"ltr\">8 c\u1ed9ng 2 b\u1eb1ng 10, vi\u1ebft 0 nh\u1edb 1\u00a0<\/p>\n<p dir=\"ltr\">2 c\u1ed9ng 1 b\u1eb1ng 3 th\u00eam 1 b\u1eb1ng 4, vi\u1ebft 4<\/p>\n<p dir=\"ltr\">V\u1eady 1245 + 2837 = 4082<\/p>\n<p dir=\"ltr\">b)<\/p>\n<p dir=\"ltr\">7 c\u1ed9ng 9 b\u1eb1ng 16, vi\u1ebft 6 nh\u1edb 1<\/p>\n<p dir=\"ltr\">5 c\u1ed9ng 1 b\u1eb1ng 6 th\u00eam 1 \u0111\u01b0\u1ee3c 7, vi\u1ebft 7\u00a0<\/p>\n<p dir=\"ltr\">8 c\u1ed9ng 0 b\u1eb1ng 8, vi\u1ebft 8\u00a0<\/p>\n<p dir=\"ltr\">4 c\u1ed9ng 2 b\u1eb1ng 6, vi\u1ebft 6\u00a0<\/p>\n<p dir=\"ltr\">H\u1ea1 19 xu\u1ed1ng \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 196876\u00a0<\/p>\n<p dir=\"ltr\">V\u1eady 2021 + 194857 = 196876<\/p>\n<p dir=\"ltr\">c)<\/p>\n<p dir=\"ltr\">5 tr\u1eeb 4 b\u1eb1ng 1, vi\u1ebft 1\u00a0<\/p>\n<p dir=\"ltr\">7 tr\u1eeb 3 b\u1eb1ng 4, vi\u1ebft 4<\/p>\n<p dir=\"ltr\">4 kh\u00f4ng tr\u1eeb \u0111\u01b0\u1ee3c cho 7 m\u01b0\u1ee3n 1, 14 tr\u1eeb 7 b\u1eb1ng 7, vi\u1ebft 7 nh\u1edb 1\u00a0<\/p>\n<p dir=\"ltr\">M\u01b0\u1ee3n 1 \u0111\u01b0\u1ee3c 18 tr\u1eeb 9 b\u1eb1ng 9, vi\u1ebft 9 nh\u1edb 1<\/p>\n<p dir=\"ltr\">2 th\u00eam 1 b\u1eb1ng 3, 9 tr\u1eeb 3 b\u1eb1ng 6, vi\u1ebft 6<\/p>\n<p dir=\"ltr\">1 tr\u1eeb 0 b\u1eb1ng 1, vi\u1ebft 1\u00a0<\/p>\n<p dir=\"ltr\">V\u1eady 198475 \u2013 28734 = 169741<\/p>\n<p dir=\"ltr\">d)<\/p>\n<p dir=\"ltr\">3 tr\u1eeb 2 b\u1eb1ng 1, vi\u1ebft 1<\/p>\n<p dir=\"ltr\">4 tr\u1eeb 3 b\u1eb1ng 1, vi\u1ebft 1\u00a0<\/p>\n<p dir=\"ltr\">6 kh\u00f4ng tr\u1eeb cho 7, m\u01b0\u1ee3n 1 \u0111\u01b0\u1ee3c 16 tr\u1eeb 7 b\u1eb1ng 9, vi\u1ebft 9 nh\u1edb 1\u00a0<\/p>\n<p dir=\"ltr\">2 th\u00eam 1 b\u1eb1ng 3, 7 tr\u1eeb 3 b\u1eb1ng 4, vi\u1ebft 4<\/p>\n<p dir=\"ltr\">H\u1ea1 98 xu\u1ed1ng \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3: 987643 \u2013 2732 = 984911<\/p>\n<p dir=\"ltr\">B\u00e0i t\u1eadp 5: Hai ng\u00e0y c\u1eeda h\u00e0ng b\u00e1n \u0111\u01b0\u1ee3c 5124 l\u00edt d\u1ea7u, bi\u1ebft ng\u00e0y th\u1ee9 hai b\u00e1n \u0111\u01b0\u1ee3c \u00edt h\u01a1n ng\u00e0y th\u1ee9 nh\u1ea5t 124 l\u00edt. H\u1ecfi m\u1ed7i ng\u00e0y b\u00e1n \u0111\u01b0\u1ee3c bao nhi\u00eau l\u00edt d\u1ea7u.\u00a0<\/p>\n<p dir=\"ltr\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i:<\/p>\n<p dir=\"ltr\">M\u1ed7i ng\u00e0y b\u00e1n \u0111\u01b0\u1ee3c s\u1ed1 l\u00edt d\u1ea7u l\u00e0:\u00a0<\/p>\n<p dir=\"ltr\">(5124 \u2013 124) : 2 = 5000 : 2 = 2500 (l\u00edt d\u1ea7u)<\/p>\n<p dir=\"ltr\">Ng\u00e0y th\u1ee9 nh\u1ea5t b\u00e1n \u0111\u01b0\u1ee3c h\u01a1n ng\u00e0y th\u1ee9 2 l\u00e0:<\/p>\n<p dir=\"ltr\">2500 + 124 = 2624 (l\u00edt d\u1ea7u)\u00a0<\/p>\n<p dir=\"ltr\">V\u1eady ng\u00e0y th\u1ee9 nh\u1ea5t b\u00e1n \u0111\u01b0\u1ee3c 2624 l\u00edt, ng\u00e0y th\u1ee9 hai b\u00e1n \u0111\u01b0\u1ee3c 2500 l\u00edt d\u1ea7u.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bai_tap_van_dung\"><\/span>B\u00e0i t\u1eadp v\u1eadn d\u1ee5ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">B\u00e0i 1: T\u00ednh nhanh:<\/p>\n<p dir=\"ltr\">a, 237 + 357 + 763<\/p>\n<p dir=\"ltr\">b, 2345 + 4257 \u2013 345<\/p>\n<p dir=\"ltr\">c, 4276 + 2357 + 5724 + 7643<\/p>\n<p dir=\"ltr\">d, 3145 + 2496 + 5347 + 7504 + 4653<\/p>\n<p dir=\"ltr\">e, 2376 + 3425 &#8211; 376 \u2013 425<\/p>\n<p dir=\"ltr\">g, 3145 &#8211; 246 + 2347 &#8211; 145 + 4246 &#8211; 347<\/p>\n<p dir=\"ltr\">B\u00e0i 2: T\u00ednh nhanh:<\/p>\n<p dir=\"ltr\">a, 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5 + 5<\/p>\n<p dir=\"ltr\">b, 25 + 25 +25 +25 + 25 + 25 + 25 + 25<\/p>\n<p dir=\"ltr\">c, 45 + 45 +45 + 45 +15 + 15 +15 + 15<\/p>\n<p dir=\"ltr\">d, 2 + 4 + 6 + 8 +10 + 12 +14 + 16 +18<\/p>\n<p dir=\"ltr\">e, 125 +125+125 +125 &#8211; 25 &#8211; 25 &#8211; 25 -25<\/p>\n<p dir=\"ltr\">B\u00e0i 3: T\u00ednh nhanh:<\/p>\n<p dir=\"ltr\">a, 425 \u00d7 3475 + 425 \u00d7 6525<\/p>\n<p dir=\"ltr\">b, 234 \u00d7 1257 &#8211; 234 \u00d7 257<\/p>\n<p dir=\"ltr\">c, 3876 \u00d7 375 + 375 \u00d7 6124<\/p>\n<p dir=\"ltr\">d, 1327 \u00d7 524 &#8211; 524 \u00d7 327<\/p>\n<p dir=\"ltr\">e, 257 \u00d7 432 + 257 \u00d7 354 + 257 \u00d7214<\/p>\n<p dir=\"ltr\">f, 325 \u00d7 1574 &#8211; 325 \u00d7 325 &#8211; 325 \u00d7249<\/p>\n<p dir=\"ltr\">g, 312 \u00d7 425 + 312 \u00d7 574 + 312<\/p>\n<p dir=\"ltr\">h, 174 \u00d7 1274 &#8211; 175 \u00d7 273 &#8211; 175<\/p>\n<p dir=\"ltr\">B\u00e0i 4: T\u00ednh nhanh:<\/p>\n<p dir=\"ltr\">a, 4 \u00d7 125 \u00d7 25 \u00d7 8<\/p>\n<p dir=\"ltr\">b, 2 \u00d7 8 \u00d7 50 \u00d7 25 \u00d7 125<\/p>\n<p dir=\"ltr\">c, 2 \u00d7 3 \u00d7 4 \u00d7 5 \u00d7 50 \u00d7 25<\/p>\n<p dir=\"ltr\">d, 25 \u00d7 20 \u00d7 125 \u00d7 8 &#8211; 8 \u00d7 20 \u00d7 5 \u00d7 125<\/p>\n<p dir=\"ltr\">B\u00e0i 5: T\u00ednh nhanh:<\/p>\n<p dir=\"ltr\">a, 8 \u00d7 427 \u00d7 3 + 6 \u00d7 573 \u00d7 4<\/p>\n<p dir=\"ltr\">b, 6 \u00d7 1235 \u00d7 20 &#8211; 5 \u00d7 235 \u00d7 24<\/p>\n<p dir=\"ltr\">c, (145 \u00d7 99 + 145) &#8211; 143 \u00d7 101 \u2013 143<\/p>\n<p dir=\"ltr\">d, 54 \u00d7 47 &#8211; 47 \u00d7 53 &#8211; 20 &#8211; 27<\/p>\n<p dir=\"ltr\">B\u00e0i 6: T\u00ednh nhanh:<\/p>\n<p dir=\"ltr\">a, 10000 &#8211; 47 \u00d7 74 &#8211; 47 \u00d7 26<\/p>\n<p dir=\"ltr\">b, 3457 &#8211; 27 \u00d7 48 &#8211; 48 \u00d7 73 + 6543<\/p>\n<p dir=\"ltr\">B\u00e0i 7: Cho A = 2009 \u00d7 425 v\u00e0 B = 575 \u00d7 2009. Kh\u00f4ng t\u00ednh A v\u00e0 B, em h\u00e3y t\u00ednh nhanh k\u1ebft qu\u1ea3 c\u1ee7a A + B?<\/p>\n<p dir=\"ltr\">B\u00e0i 8: T\u00ednh nhanh<\/p>\n<p dir=\"ltr\">(145 \u00d7 99 + 145 ) \u2013 ( 143 \u00d7 102 \u2013 143 \u00d7 2 ) + 54 \u00d7 47 \u2013 47 \u00d7 53 \u2013 20 \u2013 27<\/p>\n<p dir=\"ltr\">B\u00e0i 9: Cho bi\u1ec3u th\u1ee9c A = 1496 : (213 \u2013 x) + 237<\/p>\n<p dir=\"ltr\">a) T\u00ednh A khi x = 145<\/p>\n<p dir=\"ltr\">b) T\u00ecm x \u0111\u1ec3 A = 373<\/p>\n<p dir=\"ltr\">B\u00e0i 10: T\u00ednh<\/p>\n<p dir=\"ltr\">a, 54 \u00d7 113 + 45 \u00d7 113 + 113<\/p>\n<p dir=\"ltr\">b, 54 \u00d7 47 &#8211; 47 \u00d7 53 &#8211; 20 &#8211; 27<\/p>\n<p dir=\"ltr\">c, 10000 &#8211; 47 \u00d7 72 &#8211; 47 \u00d7 28<\/p>\n<p dir=\"ltr\">d, (145 \u00d7 99 + 145) &#8211; (143 \u00d7 101 &#8211; 143)<\/p>\n<p dir=\"ltr\">e, 1002 \u00d7 9 &#8211; 18<\/p>\n<p dir=\"ltr\">f, 8 \u00d7 427 \u00d7 3 + 6 \u00d7 573 \u00d7 4<\/p>\n<p dir=\"ltr\">g, 2008 \u00d7 867 + 2009 \u00d7 133<\/p>\n<p dir=\"ltr\">B\u00e0i 11: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c<\/p>\n<p dir=\"ltr\">a, 234576 + 578957 + 47958b, 41235 + 24756 &#8211; 37968c, 324586 &#8211; 178395 + 24605d, 254782 &#8211; 34569 &#8211; 45796<\/p>\n<p dir=\"ltr\">B\u00e0i 12: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c<\/p>\n<p dir=\"ltr\">a, 967364 + (20625 + 72438)b, 420785 + (420625 &#8211; 72438)c, (47028 + 36720) + 43256d, (35290 + 47658) &#8211; 57302e, (72058 &#8211; 45359) + 26705f, (60320 &#8211; 32578) &#8211; 17020<\/p>\n<p dir=\"ltr\">B\u00e0i 13: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c<\/p>\n<p dir=\"ltr\">a, 25178 + 2357 x 36b, 42567 + 12336 : 24c, 100532 &#8211; 374 x 38d, 2345 x 27 + 45679e, 12348 : 36 + 2435f, 134415 &#8211; 134415 : 45g, 235 x 148 &#8211; 148h, 115938 : 57 &#8211; 57<\/p>\n<p dir=\"ltr\">B\u00e0i 14: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c<\/p>\n<p dir=\"ltr\">a, 324 x 49 : 98b, 4674 : 82 x 19c, 156 + 6794 : 79d, 7055 : 83 + 124e, 784 x 23 : 46f, 1005 &#8211; 38892 : 42<\/p>\n<p dir=\"ltr\">B\u00e0i 15: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c<\/p>\n<p dir=\"ltr\">a, 427 x 234 &#8211; 325 x 168b,16616 : 67 x 8815 : 43c, 67032 : 72 + 258 x 37d, 324 x 127 : 36 + 873<\/p>\n<p dir=\"ltr\">B\u00e0i 16: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c<\/p>\n<p dir=\"ltr\">a, 213933 &#8211; 213933 : 87 x 68b, 15275 : 47 x 204 &#8211; 204c, 13623 &#8211; 13623 : 57 &#8211; 57d, 93784 : 76 &#8211; 76 x 14<\/p>\n<p dir=\"ltr\">B\u00e0i 17: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c<\/p>\n<p dir=\"ltr\">a, 48048 &#8211; 48048 : 24 &#8211; 24 x 57b, 10000 &#8211; (93120 : 24 &#8211; 24 x 57)c, 100798 &#8211; 9894 : 34 x 23 &#8211; 23d, 425 x 103 &#8211; (1274 : 14 &#8211; 14)e, (31850 &#8211; 730 x 25) : 68 &#8211; 68f, 936 x 750 &#8211; 750 : 15 -15<\/p>\n<p dir=\"ltr\">B\u00e0i 18: T\u00ednh gi\u00e1 tr\u1ecb c\u1ee7a bi\u1ec3u th\u1ee9c<\/p>\n<p dir=\"ltr\">a, 17464 &#8211; 17464 : 74 &#8211; 74 x 158b, 32047 &#8211; 17835 : 87 x 98 &#8211; 98c, (34044 &#8211; 324 x 67) : 48 &#8211; 48d, 167960 &#8211; (167960 : 68 &#8211; 68 x 34)<\/p>\n<p dir=\"ltr\">B\u00e0i 19: Cho bi\u1ec3u th\u1ee9c P = m + 527 x n. T\u00ednh P khi m = 473, n = 138.<\/p>\n<p dir=\"ltr\">B\u00e0i 20: Cho bi\u1ec3u th\u1ee9c P = 4752 : (x &#8211; 28)<\/p>\n<p dir=\"ltr\">a, T\u00ednh P khi x = 52<\/p>\n<p dir=\"ltr\">b, T\u00ecm x \u0111\u1ec3 P = 48<\/p>\n<p dir=\"ltr\">B\u00e0i 21: Cho bi\u1ec3u th\u1ee9c A = 1496 : (213 &#8211; x) + 237<\/p>\n<p dir=\"ltr\">a, T\u00ednh A khi x = 145<\/p>\n<p dir=\"ltr\">b, T\u00ecm x \u0111\u1ec3 A = 373<\/p>\n<p dir=\"ltr\">B\u00e0i 22: Cho bi\u1ec3u th\u1ee9c B = 97 x (x + 396) + 206<\/p>\n<p dir=\"ltr\">a, T\u00ednh B khi x = 57<\/p>\n<p dir=\"ltr\">b, T\u00ecm x \u0111\u1ec3 B = 40849<\/p>\n<p dir=\"ltr\">B\u00e0i 23: Vi\u1ebft m\u1ed7i bi\u1ec3u th\u1ee9c sau th\u00e0nh t\u00edch c\u00e1c th\u1eeba s\u1ed1:<\/p>\n<p dir=\"ltr\">a, 12 + 18 + 24 + 30 + 36 + 42<\/p>\n<p dir=\"ltr\">b, mm + pp + xx + yy<\/p>\n<p dir=\"ltr\">c, 1212 + 2121 + 4242 + 2424<\/p>\n<p dir=\"ltr\">B\u00e0i 24: Cho bi\u1ec3u th\u1ee9c A = 3 x 15 + 18 : 6 + 3. H\u00e3y \u0111\u1eb7t d\u1ea5u ngo\u1eb7c v\u00e0o v\u1ecb tr\u00ed th\u00edch h\u1ee3p \u0111\u1ec3 bi\u1ec3u th\u1ee9c A c\u00f3 gi\u00e1 tr\u1ecb l\u00e0 (tr\u00ecnh b\u00e0y c\u00e1c b\u01b0\u1edbc th\u1ef1c hi\u1ec7n)<\/p>\n<p dir=\"ltr\">a, 47<\/p>\n<p dir=\"ltr\">b, S\u1ed1 b\u00e9 nh\u1ea5t c\u00f3 th\u1ec3<\/p>\n<p dir=\"ltr\">c, S\u1ed1 l\u1edbn nh\u1ea5t c\u00f3 th\u1ec3<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bi_quyet_hoc_toan_lop_4_tinh_gia_tri_bieu_thuc_hieu_qua\"><\/span>B\u00ed quy\u1ebft h\u1ecdc to\u00e1n l\u1edbp 4 t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c hi\u1ec7u qu\u1ea3<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ed1i v\u1edbi ki\u1ebfn th\u1ee9c t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c to\u00e1n l\u1edbp 4, \u0111\u1ec3 gi\u00fap c\u00e1c em d\u1ec5 hi\u1ec3u, d\u1ec5 chinh ph\u1ee5c \u0111\u01b0\u1ee3c b\u00e0i t\u1eadp n\u00e0y th\u00ec \u0111\u1eebng b\u1ecf qua m\u1ed9t s\u1ed1 b\u00ed quy\u1ebft sau:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/tinh-gia-tri-bieu-thuc-lop-4-2.jpg\" alt=\"C\u1ea7n n\u1eafm r\u00f5 nh\u1eefng quy t\u1eafc s\u1eed d\u1ee5ng ph\u00e9p t\u00ednh khi t\u00ednh bi\u1ec3u th\u1ee9c. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<ul>\n<li dir=\"ltr\">N\u1eafm r\u00f5 quy t\u1eafc t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c: Ch\u1ec9 khi n\u1eafm \u0111\u01b0\u1ee3c nh\u1eefng quy t\u1eafc n\u00e0y th\u00ec m\u1edbi \u0111\u00e1p b\u1ea3o th\u1ef1c hi\u1ec7n ph\u00e9p t\u00ednh ch\u00ednh x\u00e1c, kh\u00f4ng b\u1ecb nh\u1ea7m l\u1eabn gi\u1eefa c\u00e1c d\u1ea5u.<\/li>\n<li dir=\"ltr\">\u00c1p d\u1ee5ng c\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a ph\u00e9p c\u1ed9ng\/tr\u1eeb\/nh\u00e2n\/chia: V\u1edbi m\u1ed7i ph\u00e9p t\u00ednh s\u1ebd c\u00f3 nh\u1eefng t\u00ednh ch\u1ea5t \u0111i k\u00e8m, n\u00ean vi\u1ec7c \u00e1p d\u1ee5ng nh\u1eefng t\u00ednh ch\u1ea5t \u0111\u00f3 c\u0169ng s\u1ebd h\u1ed7 tr\u1ee3 vi\u1ec7c t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c ch\u00ednh x\u00e1c h\u01a1n.<\/li>\n<\/ul>\n<p dir=\"ltr\">Xem th\u00eam:<\/p>\n<p dir=\"ltr\">T\u00ednh ch\u1ea5t ph\u00e9p c\u1ed9ng<\/p>\n<p dir=\"ltr\">T\u00ednh ch\u1ea5t ph\u00e9p tr\u1eeb<\/p>\n<p dir=\"ltr\">T\u00ednh ch\u1ea5t ph\u00e9p nh\u00e2n<\/p>\n<p dir=\"ltr\">T\u00ednh ch\u1ea5t ph\u00e9p chia<\/p>\n<ul>\n<li dir=\"ltr\">Th\u1ef1c h\u00e0nh luy\u1ec7n t\u1eadp th\u01b0\u1eddng xuy\u00ean: R\u00e8n luy\u1ec7n th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean ch\u00ednh l\u00e0 c\u00e1ch t\u1ed1t nh\u1ea5t \u0111\u1ec3 c\u00e1c em c\u00f3 th\u1ec3 n\u00e2ng cao ki\u1ebfn th\u1ee9c c\u1ee7a m\u00ecnh. V\u1eady n\u00ean, ngo\u00e0i l\u00e0m b\u00e0i t\u1eadp trong SGK, c\u00e1c em c\u00f3 th\u1ec3 luy\u1ec7n t\u1eadp th\u00eam nhi\u1ec1u b\u00e0i t\u1eadp tr\u00ean internet, luy\u1ec7n \u0111\u1ec1 thi, \u1ee9ng d\u1ee5ng v\u00e0o th\u1ef1c ti\u1ec5n,\u2026<\/li>\n<li dir=\"ltr\">Trang b\u1ecb n\u1ec1n t\u1ea3ng to\u00e1n v\u1eefng ch\u1eafc cho tr\u1ebb c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math: \u0110\u00e2y l\u00e0 \u1ee9ng d\u1ee5ng d\u1ea1y h\u1ecdc to\u00e1n t\u01b0 duy online d\u00e0nh cho c\u00e1c b\u00e9 m\u1ea7m non v\u00e0 ti\u1ec3u h\u1ecdc, nh\u01b0ng v\u1eabn \u0111\u1ea3m b\u1ea3o n\u1ed9i dung b\u00e1m s\u00e1t ch\u01b0\u01a1ng tr\u00ecnh GDPT m\u1edbi nh\u1ea5t. \u0110\u1eb7c bi\u1ec7t, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math \u00e1p d\u1ee5ng \u0111a ph\u01b0\u01a1ng ph\u00e1p h\u1ecdc to\u00e1n qua tr\u00f2 ch\u01a1i gi\u00e1o d\u1ee5c, video h\u00ecnh \u1ea3nh ho\u1ea1t ho\u1ea1, s\u00e1ch b\u00e0i t\u1eadp b\u1ed5 tr\u1ee3\u2026 c\u00f9ng n\u1ed9i dung ph\u00e2n chia th\u00e0nh nhi\u1ec1u c\u1ea5p \u0111\u1ed9, \u0111a d\u1ea1ng ch\u1ee7 \u0111\u1ec1 h\u1ecdc \u0111\u1ec3 gi\u00fap n\u00e2ng cao hi\u1ec7u qu\u1ea3 ti\u1ebfp thu, h\u1ee9ng th\u00fa h\u01a1n khi h\u1ecdc to\u00e1n. C\u00f9ng h\u1ec7 th\u1ed1ng b\u00e0i h\u1ecdc \u0111\u1ed3 s\u1ed9, c\u00e1ch d\u1ea1y chuy\u00ean nghi\u1ec7p s\u1ebd gi\u00fap Ph\u00e1t tri\u1ec3n 5 n\u0103ng l\u1ef1c To\u00e1n h\u1ecdc theo ch\u01b0\u01a1ng tr\u00ecnh GDPT m\u1edbi &amp; h\u00ecnh th\u00e0nh th\u00f3i quen t\u01b0 duy logic ngay t\u1eeb nh\u1ecf hi\u1ec7u qu\u1ea3.<\/li>\n<\/ul>\n<p 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\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 nh\u1eadn \u01b0u \u0111\u00e3i l\u00ean t\u1edbi 40% c\u00f9ng nhi\u1ec1u qu\u00e0 t\u1eb7ng h\u1ea5p d\u1eabn t\u1eeb Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef d\u00e0nh cho c\u00e1c b\u00e9.<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/taimienphiMM.png\" alt=\"\" width=\"200\" height=\"41\"><\/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\">Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng th\u00f4ng tin ki\u1ebfn th\u1ee9c v\u1ec1 t\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c l\u1edbp 4. \u0110\u00e2y l\u00e0 m\u1ed9t d\u1ea1ng to\u00e1n ph\u1ed5 bi\u1ebfn trong c\u00e1c \u0111\u1ec1 thi, b\u00e0i t\u1eadp hay \u1ee9ng d\u1ee5ng th\u1ef1c ti\u1ec5n n\u00ean vi\u1ec7c n\u1eafm r\u00f5 nh\u1eefng ki\u1ebfn th\u1ee9c tr\u00ean th\u1ef1c s\u1ef1 r\u1ea5t c\u1ea7n thi\u1ebft.<\/p>\n<p>Ngu\u1ed3n: <a href=\"https:\/\/www.ckconitsha.com\/vn\/\">https:\/\/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>T\u00ednh gi\u00e1 tr\u1ecb bi\u1ec3u th\u1ee9c l\u1edbp 4 l\u00e0 m\u1ed9t trong nh\u1eefng chuy\u00ean \u0111\u1ec1 quan tr\u1ecdng, th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n trong c\u00e1c \u0111\u1ec1 thi to\u00e1n, c\u0169ng nh\u01b0 \u1ee9ng d\u1ee5ng trong th\u1ef1c ti\u1ec5n. V\u1eady n\u00ean, \u0111\u1ec3 gi\u00fap c\u00e1c em chinh ph\u1ee5c \u0111\u01b0\u1ee3c d\u1ea1ng to\u00e0n n\u00e0y, n\u1ed9i dung sau \u0111\u00e2y Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef s\u1ebd ph\u00e2n&#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-14279","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14279","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=14279"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14279\/revisions"}],"predecessor-version":[{"id":17207,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/14279\/revisions\/17207"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=14279"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=14279"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=14279"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}