{"id":8343,"date":"2025-04-05T14:39:09","date_gmt":"2025-04-05T07:39:09","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=8343"},"modified":"2025-06-29T08:05:04","modified_gmt":"2025-06-29T01:05:04","slug":"cong-thuc-tim-boi-chung-nho-nhat-va-cach-hoc-de-hieu-nhat","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tim-boi-chung-nho-nhat-va-cach-hoc-de-hieu-nhat\/","title":{"rendered":"C\u00f4ng th\u1ee9c t\u00ecm b\u1ed9i chung nh\u1ecf nh\u1ea5t v\u00e0 c\u00e1ch h\u1ecdc d\u1ec5 hi\u1ec3u 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\/cong-thuc-tim-boi-chung-nho-nhat-va-cach-hoc-de-hieu-nhat\/#Cach_tim_BCNN_dua_tren_cac_dinh_nghia\" >C\u00e1ch t\u00ecm BCNN d\u1ef1a tr\u00ean c\u00e1c \u0111\u1ecbnh ngh\u0129a<\/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\/cong-thuc-tim-boi-chung-nho-nhat-va-cach-hoc-de-hieu-nhat\/#Cac_boi_so_toi_thieu_bang_cach_phan_tich_so_luong_cac_yeu_to_chinh\" >C\u00e1c b\u1ed9i s\u1ed1 t\u1ed1i thi\u1ec3u b\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch s\u1ed1 l\u01b0\u1ee3ng c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tim-boi-chung-nho-nhat-va-cach-hoc-de-hieu-nhat\/#Huong_dan_ve_cach_tim_mot_boi_so_pho_bien_thong_qua_boi_so_nho_nhat\" >H\u01b0\u1edbng d\u1eabn v\u1ec1 c\u00e1ch t\u00ecm m\u1ed9t b\u1ed9i s\u1ed1 ph\u1ed5 bi\u1ebfn th\u00f4ng qua b\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tim-boi-chung-nho-nhat-va-cach-hoc-de-hieu-nhat\/#Mot_so_bai_tap_chung_nho_nhat_cho_tre_em\" >M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp chung nh\u1ecf nh\u1ea5t cho tr\u1ebb em<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/cong-thuc-tim-boi-chung-nho-nhat-va-cach-hoc-de-hieu-nhat\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ecm th\u1ea5y nhi\u1ec1u chung nh\u1ea5t nhanh nh\u1ea5t? Ch\u1eafc ch\u1eafn c\u00e2u h\u1ecfi m\u00e0 nhi\u1ec1u h\u1ecdc sinh l\u1edbp 6 quan t\u00e2m. \u0110\u1ec3 gi\u00fap h\u1ecd gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp n\u00f3i chung nh\u1ecf nh\u1ea5t \u0111\u01a1n gi\u1ea3n h\u01a1n th\u00f4ng qua vi\u1ec7c t\u00ecm chi ti\u1ebft, h\u00e3y \u0111\u1ec3 Kh\u1ec9 t\u00ecm hi\u1ec3u th\u00eam trong b\u00e0i vi\u1ebft sau.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cach_tim_BCNN_dua_tren_cac_dinh_nghia\"><\/span>C\u00e1ch t\u00ecm BCNN d\u1ef1a tr\u00ean c\u00e1c \u0111\u1ecbnh ngh\u0129a<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">T\u1eadp h\u1ee3p c\u00e1c b\u1ed9i s\u1ed1 chung c\u1ee7a hai s\u1ed1 A v\u00e0 B \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u l\u00e0: BC (A, B)<\/p>\n<p dir=\"ltr\">T\u01b0\u01a1ng t\u1ef1, b\u1ed9 s\u01b0u t\u1eadp b\u1ed9i s\u1ed1 chung c\u1ee7a A, B, C \u0111\u01b0\u1ee3c t\u01b0\u1ee3ng tr\u01b0ng l\u00e0: BC (A, B, C)<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: <em>T\u00ecm BC (3, 4).<\/em><\/p>\n<p dir=\"ltr\"><em>C\u00e1c y\u1ebfu t\u1ed1 chung c\u1ee7a B (3) v\u00e0 B (4) l\u00e0: 0; 12; 24; 36; &#8230;<\/em><\/p>\n<p dir=\"ltr\"><em>V\u00ec v\u1eady, BC (3, 4) = {0; 12; 24; 36; &#8230;}<\/em><\/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\/tim-boi-chung-nho-nhat-1.jpg\" alt=\"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ecm BCNN c\u00f3 nhi\u1ec1u ph\u01b0\u01a1ng ph\u00e1p kh\u00e1c nhau. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">C\u00e1ch t\u00ecm BC (A, B) &#8211; Thu th\u1eadp c\u00e1c b\u1ed9 ph\u1eadn chung c\u1ee7a A v\u00e0 B:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Vi\u1ebft m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c b\u1ed9i s\u1ed1 chung c\u1ee7a A v\u00e0 b\u1ed9i s\u1ed1 c\u1ee7a B: B (A), B (B);<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ti\u1ebfn h\u00e0nh t\u00ecm c\u00e1c y\u1ebfu t\u1ed1 ph\u1ed5 bi\u1ebfn c\u1ee7a B (a) v\u00e0 B (b). \u0110\u00e2y c\u0169ng l\u00e0 c\u00e1c y\u1ebfu t\u1ed1 c\u1ee7a BC (A, B).<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">V\u00ed d\u1ee5: <em>T\u00ecm m\u1ed9t b\u1ed9 m bao g\u1ed3m c\u00e1c s\u1ed1 d\u01b0\u1edbi 30 l\u00e0 b\u1ed9i s\u1ed1 chung c\u1ee7a 3; 4 v\u00e0 6.<\/em><\/p>\n<p dir=\"ltr\"><em>Ch\u00fang t\u00f4i c\u00f3:<\/em><\/p>\n<p dir=\"ltr\"><em>B (3) = {0; 3; 6; 9; 12; 15; 18; 21; 24; 27; 30; 33; 36; &#8230;}<\/em><\/p>\n<p dir=\"ltr\"><em>B (4) = {0; 4; 8; 12; 16; 20; 24; 28; 32; 36; 40; &#8230;}<\/em><\/p>\n<p dir=\"ltr\"><em>B (6) = {0; 6; 12; 18; 24; 30; 36; 42; &#8230;}<\/em><\/p>\n<p dir=\"ltr\"><em>T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, ch\u00fang t\u00f4i c\u00f3 BC (3, 4, 6) = {0; 12; 24; 36; &#8230;}<\/em><\/p>\n<p dir=\"ltr\"><em>V\u00ec M bao g\u1ed3m c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean nh\u1ecf h\u01a1n 30, ch\u00fang t\u00f4i ch\u1ec9 l\u1ea5y c\u00e1c ph\u1ea7n t\u1eed 0; 12; 24.<\/em><\/p>\n<p dir=\"ltr\"><em>Do \u0111\u00f3: m = {0; 12; 24}<\/em><\/p>\n<p dir=\"ltr\">B\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t c\u1ee7a A v\u00e0 B l\u00e0 s\u1ed1 nh\u1ecf nh\u1ea5t ngo\u00e0i 0 trong t\u1eadp h\u1ee3p b\u1ed9i s\u1ed1 c\u1ee7a a v\u00e0 b.<\/p>\n<p dir=\"ltr\">B\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t c\u1ee7a A v\u00e0 B \u0111\u01b0\u1ee3c k\u00fd hi\u1ec7u:<\/p>\n<p dir=\"ltr\">BCNN (A, B)<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: <em>T\u00ecm BCNN (4, 5).<\/em><\/p>\n<p dir=\"ltr\"><em>T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, s\u1ed1 nh\u1ecf nh\u1ea5t kh\u00e1c v\u1edbi 0 trong b\u1ed9 chung 4 v\u00e0 5 l\u00e0 20. Suy ra, BCNN (4.5) = 20.<\/em><\/p>\n<p dir=\"ltr\">C\u00e1ch t\u00ecm BCNN (A, B):<\/p>\n<p dir=\"ltr\">T\u00ecm BC (A, B);<\/p>\n<p dir=\"ltr\">T\u00ecm s\u1ed1 nh\u1ecf nh\u1ea5t ngo\u00e0i 0 trong SET BC (A, B). \u0110\u00f3 l\u00e0 bcnn (a, b).<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: <em>T\u00ecm BCNN (6, 8).<\/em><\/p>\n<p dir=\"ltr\"><em>Ch\u00fang t\u00f4i c\u00f3:<\/em><\/p>\n<p dir=\"ltr\"><em>B (6) = {0; 6; 12; 18; 24; 30; 36; 42; 48; 54; 60; &#8230;}<\/em><\/p>\n<p dir=\"ltr\"><em>B (8) = {0; 8; 16; 24; 32; 40; 48; 56; 64; &#8230;}<\/em><\/p>\n<p dir=\"ltr\"><em>T\u01b0\u01a1ng \u1ee9ng v\u1edbi BC (6, 8) = {0; 24; 48; &#8230;}. Suy ra, s\u1ed1 nh\u1ecf nh\u1ea5t kh\u00e1c v\u1edbi 0 trong b\u1ed9 BC (6, 8) l\u00e0 24.<\/em><\/p>\n<p dir=\"ltr\"><em>T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, ch\u00fang t\u00f4i t\u00ednh to\u00e1n bcnn (6, 8) = 24<\/em><\/p>\n<p dir=\"ltr\">BC (A, B) l\u00e0 m\u1ed9t b\u1ed9 s\u01b0u t\u1eadp v\u00e0 BCNN (A, B) l\u00e0 m\u1ed9t s\u1ed1.<\/p>\n<p dir=\"ltr\">V\u1edbi t\u1ea5t c\u1ea3 c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean A v\u00e0 B kh\u00e1c v\u1edbi 0, ch\u00fang t\u00f4i c\u00f3:<\/p>\n<p dir=\"ltr\">Bcnn (a, 1) = a;<\/p>\n<p dir=\"ltr\">Bcnn (a, b, 1) = bcnn (a, b)<\/p>\n<p dir=\"ltr\">Trong s\u1ed1 c\u00e1c s\u1ed1 \u0111\u00e3 cho, n\u1ebfu s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 to\u00e0n b\u1ed9 ph\u1ea7n c\u00f2n l\u1ea1i, th\u00ec m\u1ee9c t\u1ed1i thi\u1ec3u c\u1ee7a c\u00e1c s\u1ed1 \u0111\u00e3 cho l\u00e0 s\u1ed1 l\u1edbn nh\u1ea5t.<\/p>\n<p dir=\"ltr\">N\u1ebfu a \u22ee b th\u00ec bcnn (a, b) = a.<\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: <em>T\u00ecm BCNN (18, 36).<\/em><\/p>\n<p dir=\"ltr\"><em>V\u00ec 36 \u22ee 18, BCNN (18, 36) = 36<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_boi_so_toi_thieu_bang_cach_phan_tich_so_luong_cac_yeu_to_chinh\"><\/span>C\u00e1c b\u1ed9i s\u1ed1 t\u1ed1i thi\u1ec3u b\u1eb1ng c\u00e1ch ph\u00e2n t\u00edch s\u1ed1 l\u01b0\u1ee3ng c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">M\u1ed9t trong nh\u1eefng c\u00e1ch nh\u1ecf nh\u1ea5t \u0111\u1ec3 t\u00ecm c\u00e1c b\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t m\u00e0 m\u1ecdi ng\u01b0\u1eddi c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng khi v\u1ea5n \u0111\u1ec1 l\u00e0 c\u00e1c s\u1ed1 A v\u00e0 B kh\u00f4ng qu\u00e1 l\u1edbn l\u00e0 ph\u00e2n t\u00edch th\u00e0nh c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh. C\u00e1c b\u01b0\u1edbc 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\/tim-boi-chung-nho-nhat-2.jpg\" alt=\"Ph\u00e2n t\u00edch c\u00e1c con s\u1ed1 th\u00e0nh c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh \u0111\u1ec3 t\u00ecm BCNN. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 1: Th\u1ef1c hi\u1ec7n ph\u00e2n t\u00edch t\u1eebng s\u1ed1 \u0111\u00e3 cho v\u00e0o s\u1ed1 nguy\u00ean t\u1ed1.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 2: B\u1eaft \u0111\u1ea7u ch\u1ecdn c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh v\u00e0 ri\u00eang bi\u1ec7t.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 3.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">V\u00ed d\u1ee5: <em>T\u00ecm BCNN (8, 18, 30)<\/em><\/p>\n<p dir=\"ltr\"><em>B\u01b0\u1edbc 1: H\u1ecd c\u1ea7n ph\u00e2n t\u00edch 3 s\u1ed1 tr\u00ean s\u1ed1 d\u1ef1 ph\u00f2ng. C\u1ee5 th\u1ec3:<\/em><\/p>\n<p dir=\"ltr\"><em>8 = 2\u00b3<\/em><\/p>\n<p dir=\"ltr\"><em>18 = 2 \u00d7 3\u00b2<\/em><\/p>\n<p dir=\"ltr\"><em>30 = 2 \u00d7 3 \u00d7 5<\/em><\/p>\n<p dir=\"ltr\"><em>B\u01b0\u1edbc 2: Ti\u1ebfn h\u00e0nh ch\u1ecdn c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh v\u00e0 ri\u00eang bi\u1ec7t, t\u01b0\u01a1ng \u1ee9ng s\u1ebd l\u00e0 2, 3 v\u00e0 5. T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, s\u1ed1 m\u0169 l\u1edbn nh\u1ea5t c\u1ee7a 2 l\u00e0 3, s\u1ed1 m\u0169 c\u1ee7a 3 l\u00e0 2 v\u00e0 5 s\u1ebd l\u00e0 1.<\/em><\/p>\n<p dir=\"ltr\"><em>B\u01b0\u1edbc 3: T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, s\u1ea3n ph\u1ea9m c\u1ee7a nh\u1eefng con s\u1ed1 \u0111\u00f3 s\u1ebd l\u00e0 BCNN l\u00e0 8, 18, 30 s\u1ebd l\u00e0 2\u00b3 \u00d7 3\u00b2 \u00d7 5 = 360<\/em><\/p>\n<p dir=\"ltr\"><em>Ch\u00fa \u00fd:<\/em><\/p>\n<p dir=\"ltr\"><em>N\u1ebfu s\u1ed1 \u0111\u00e3 cho l\u00e0 m\u1ed9t c\u1eb7p s\u1ed1 nguy\u00ean t\u1ed1 c\u00f9ng nhau, t\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y BCNN l\u00e0 s\u1ea3n ph\u1ea9m c\u1ee7a c\u00e1c s\u1ed1 \u0111\u00f3. V\u00ed d\u1ee5: BCNN (5, 7, 8) = 5 \u00d7 7 \u00d7 8 = 280<\/em><\/p>\n<p dir=\"ltr\"><em>Trong tr\u01b0\u1eddng h\u1ee3p c\u1ee7a c\u00e1c s\u1ed1 \u0111\u00e3 cho, n\u1ebfu s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 b\u1ed9i s\u1ed1 c\u1ee7a ph\u1ea7n c\u00f2n l\u1ea1i, t\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y BCNN l\u00e0 s\u1ed1 l\u1edbn nh\u1ea5t. V\u00ed d\u1ee5: BCNN (12, 16, 48) = 48<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Huong_dan_ve_cach_tim_mot_boi_so_pho_bien_thong_qua_boi_so_nho_nhat\"><\/span>H\u01b0\u1edbng d\u1eabn v\u1ec1 c\u00e1ch t\u00ecm m\u1ed9t b\u1ed9i s\u1ed1 ph\u1ed5 bi\u1ebfn th\u00f4ng qua b\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">T\u1ea5t c\u1ea3 c\u00e1c b\u1ed9i s\u1ed1 ph\u1ed5 bi\u1ebfn c\u1ee7a hai ho\u1eb7c nhi\u1ec1u s\u1ed1 l\u00e0 b\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t c\u1ee7a c\u00e1c s\u1ed1 \u0111\u00f3. V\u00ec v\u1eady, m\u1ecdi ng\u01b0\u1eddi c\u0169ng c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y BCNN trong c\u00e1c b\u01b0\u1edbc sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 1: T\u00ecm b\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t c\u1ee7a nh\u1eefng con s\u1ed1 \u0111\u00f3.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 2: T\u00ecm t\u1eadp h\u1ee3p b\u1ed9i s\u1ed1 c\u1ee7a b\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t. \u0110\u00e2y c\u0169ng l\u00e0 m\u1ed9t b\u1ed9 s\u01b0u t\u1eadp \u0111\u1ec3 t\u00ecm.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/tim-boi-chung-nho-nhat-3.jpg\" alt=\"D\u1ef1a tr\u00ean BCNN \u0111\u1ec3 t\u00ecm m\u1ed9t b\u1ed9i s\u1ed1 \u0111\u01a1n gi\u1ea3n. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: <em>T\u00ecm BCNN (24, 72)<\/em><\/p>\n<p dir=\"ltr\"><em>B\u1edfi v\u00ec 72 \u22ee 24, Bcnn (72, 24) = 72.<\/em><\/p>\n<table style=\"border-collapse: collapse;width: 100%;background-color: #C2E0F4\" border=\"1\">\n<tr>\n<td style=\"width: 98.5249%\">\n<p class=\"\" data-start=\"0\" data-end=\"351\">Gi\u00fap con b\u1ea1n h\u1ecdc to\u00e1n v\u00e0 h\u1ecdc to\u00e1n y\u00eau m\u1ed7i ng\u00e0y v\u1edbi to\u00e1n h\u1ecdc kh\u1ec9 -\u1ee9ng d\u1ee5ng h\u00e0ng \u0111\u1ea7u \u0111\u1ec3 \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p t\u01b0 duy s\u00e1ng t\u1ea1o, gi\u00fap tr\u1ebb ti\u1ebfp c\u1eadn to\u00e1n h\u1ecdc theo c\u00e1ch d\u1ec5 hi\u1ec3u, s\u1ed1ng \u0111\u1ed9ng v\u00e0 th\u00fa v\u1ecb. V\u1edbi h\u00e0ng tr\u0103m b\u00e0i h\u1ecdc tr\u1ef1c quan, c\u00e1c tr\u00f2 ch\u01a1i t\u01b0\u01a1ng t\u00e1c v\u00e0 l\u1ed9 tr\u00ecnh ph\u00f9 h\u1ee3p cho m\u1ed7i \u0111\u1ed9 tu\u1ed5i, em b\u00e9 s\u1ebd l\u00e0m ch\u1ee7 ki\u1ebfn \u200b\u200bth\u1ee9c m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean m\u00e0 kh\u00f4ng \u00e1p l\u1ef1c.<\/p>\n<p class=\"\" style=\"text-align: center\" data-start=\"353\" data-end=\"462\">\u0110\u0103ng k\u00fd ngay h\u00f4m nay \u0111\u1ec3 nh\u1eadn \u0111\u01b0\u1ee3c gi\u1ea3m gi\u00e1 t\u1edbi 40% v\u00e0 \u0111i c\u00f9ng em b\u00e9 c\u1ee7a b\u1ea1n tr\u00ean h\u00e0nh tr\u00ecnh chinh ph\u1ee5c to\u00e1n h\u1ecdc!<\/p>\n<p class=\"\" style=\"text-align: center\" data-start=\"353\" data-end=\"462\"><img loading=\"lazy\" decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/dang-ky-ngay-1.gif\" alt=\"\" width=\"200\" height=\"79\"><\/p>\n<\/td>\n<\/tr>\n<\/table>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_bai_tap_chung_nho_nhat_cho_tre_em\"><\/span>M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp chung nh\u1ecf nh\u1ea5t cho tr\u1ebb em<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t b\u1ea3n t\u00f3m t\u1eaft c\u1ee7a m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp t\u00ednh to\u00e1n chung nh\u1ecf nh\u1ea5t \u0111\u1ec3 ch\u00fang c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng c\u00e1c c\u00e1ch th\u1ef1c h\u00e0nh tr\u00ean.<\/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\/tim-boi-chung-nho-nhat-4.jpg\" alt=\"(Ngu\u1ed3n: T\u00f3m t\u1eaft)\" width=\"100%\"><\/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 th\u00f4ng tin gi\u00fap m\u1ecdi ng\u01b0\u1eddi hi\u1ec3u r\u00f5 h\u01a1n c\u00e1ch t\u00ecm b\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t. V\u1ec1 c\u01a1 b\u1ea3n, h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc n\u00e0y s\u1ebd kh\u00f4ng qu\u00e1 kh\u00f3 \u0111\u1ec3 n\u1eafm b\u1eaft c\u00e1c y\u00eau c\u1ea7u v\u00e0 \u00e1p d\u1ee5ng c\u00e1c b\u01b0\u1edbc m\u00e0 kh\u1ec9 \u0111\u00e3 chia s\u1ebb. Ch\u00fac b\u1ea1n c\u00f3 th\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 t\u1ed1t nh\u1edd nh\u1eefng ki\u1ebfn \u200b\u200bth\u1ee9c tr\u00ean.<\/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>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ecm th\u1ea5y nhi\u1ec1u chung nh\u1ea5t nhanh nh\u1ea5t? Ch\u1eafc ch\u1eafn c\u00e2u h\u1ecfi m\u00e0 nhi\u1ec1u h\u1ecdc sinh l\u1edbp 6 quan t\u00e2m. \u0110\u1ec3 gi\u00fap h\u1ecd gi\u1ea3i quy\u1ebft c\u00e1c b\u00e0i t\u1eadp n\u00f3i chung nh\u1ecf nh\u1ea5t \u0111\u01a1n gi\u1ea3n h\u01a1n th\u00f4ng qua vi\u1ec7c t\u00ecm chi ti\u1ebft, h\u00e3y \u0111\u1ec3 Kh\u1ec9 t\u00ecm hi\u1ec3u th\u00eam trong b\u00e0i vi\u1ebft sau. C\u00e1ch&#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-8343","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/8343","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=8343"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/8343\/revisions"}],"predecessor-version":[{"id":8690,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/8343\/revisions\/8690"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=8343"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=8343"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=8343"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}