{"id":18549,"date":"2025-07-06T10:50:04","date_gmt":"2025-07-06T03:50:04","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=18549"},"modified":"2025-07-06T10:50:04","modified_gmt":"2025-07-06T03:50:04","slug":"tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/","title":{"rendered":"T\u1ea5t t\u1ea7n t\u1eadt ki\u1ebfn th\u1ee9c v\u1ec1 b\u1ed9i chung nh\u1ecf nh\u1ea5t to\u00e1n l\u1edbp 6"},"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\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Toi_thieu_cua_boi_so_chung_va_nho_nhat_la_bao_nhieu\" >T\u1ed1i thi\u1ec3u c\u1ee7a b\u1ed9i s\u1ed1 chung v\u00e0 nh\u1ecf nh\u1ea5t l\u00e0 bao nhi\u00eau?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Nhieu_cai_chung_la_gi\" >Nhi\u1ec1u c\u00e1i chung l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Boi_so_chung_nho_nhat_la_gi\" >B\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t l\u00e0 g\u00ec?<\/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\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Bieu_tuong\" >Bi\u1ec3u t\u01b0\u1ee3ng<\/a><\/li><\/ul><\/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\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Khi_nao_tim_BCNN_cua_hai_so\" >Khi n\u00e0o t\u00ecm BCNN c\u1ee7a hai s\u1ed1?<\/a><\/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\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Lam_the_nao_de_tim_ra_boi_so_chung_nho_nhat_trong_lop_6\" >L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ecm ra b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t trong l\u1edbp 6?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Cac_dang_boi_so_nho_nhat_va_nhieu_bai_tap_o_lop_6\" >C\u00e1c d\u1ea1ng b\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t v\u00e0 nhi\u1ec1u b\u00e0i t\u1eadp \u1edf l\u1edbp 6<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Mau_1_Loai_phat_hien_BCNN_cua_mot_so_duoc_dua_ra_truoc\" >M\u1eabu 1: Lo\u1ea1i ph\u00e1t hi\u1ec7n BCNN c\u1ee7a m\u1ed9t s\u1ed1 \u0111\u01b0\u1ee3c \u0111\u01b0a ra tr\u01b0\u1edbc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Mau_2_Van_de_la_tim_ra_bcnn_cua_mot_so\" >M\u1eabu 2: V\u1ea5n \u0111\u1ec1 l\u00e0 t\u00ecm ra bcnn c\u1ee7a m\u1ed9t s\u1ed1<\/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\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Mau_3_Tim_BCNN_cua_hai_hoac_nhieu_so_de_dap_ung_mot_so_dieu_kien_nhat_dinh\" >M\u1eabu 3: T\u00ecm BCNN c\u1ee7a hai ho\u1eb7c nhi\u1ec1u s\u1ed1 \u0111\u1ec3 \u0111\u00e1p \u1ee9ng m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n nh\u1ea5t \u0111\u1ecbnh<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Cac_bai_tap_chung_nho_nhat_o_lop_6_de_tre_thuc_hanh\" >C\u00e1c b\u00e0i t\u1eadp chung nh\u1ecf nh\u1ea5t \u1edf l\u1edbp 6 \u0111\u1ec3 tr\u1ebb th\u1ef1c h\u00e0nh<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-boi-chung-nho-nhat-toan-lop-6\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>Nhi\u1ec1u l\u1edbp 6 nh\u1ecf nh\u1ea5t l\u00e0 m\u1ed9t trong nh\u1eefng ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc c\u01a1 b\u1ea3n m\u00e0 h\u1ecd s\u1ebd l\u00e0m quen, h\u1ecdc v\u00e0 l\u00e0m b\u00e0i t\u1eadp v\u1ec1 nh\u00e0. \u0110\u1ed3ng th\u1eddi, \u0111\u00e2y c\u0169ng l\u00e0 h\u00ecnh th\u1ee9c c\u1ee7a c\u00e1c b\u00e0i t\u1eadp xu\u1ea5t hi\u1ec7n trong c\u00e1c k\u1ef3 thi.<\/p>\n<p>V\u1eady b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t l\u00e0 g\u00ec? L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 gi\u1ea3i to\u00e1n to\u00e1n l\u1edbp 6 v\u00e0 b\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t? H\u00e3y t\u00ecm hi\u1ec3u chi ti\u1ebft trong b\u00e0i vi\u1ebft sau.<\/p>\n<p>                                                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img_default\/monkey3.png\" alt=\"\"><\/p>\n<p class=\"title\">H\u00e0ng tri\u1ec7u tr\u1ebb em \u0111\u00e3 ph\u00e1t tri\u1ec3n c\u00e1c k\u1ef9 n\u0103ng ng\u00f4n ng\u1eef c\u1ee7a ch\u00fang th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp c\u1ee7a kh\u1ec9<\/p>\n<p class=\"description\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u1ec1 c\u00e1c s\u1ea3n ph\u1ea9m v\u00e0 tuy\u1ebfn h\u1ecdc h\u1ecdc cho tr\u1ebb em.<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra t\u00ean \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a b\u1ea1n *Vui l\u00f2ng ki\u1ec3m tra s\u1ed1 \u0111i\u1ec7n tho\u1ea1i h\u01a1n 2.000 t\u1eeb &amp; 6.000 c\u00e2u ti\u1ebfng Anh \u0111\u1ec3 ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n 4 k\u1ef9 n\u0103ng ti\u1ebfng Anh t\u1ed1t &#8211; ti\u1ebfng Anh theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7n \u0111\u1ea1i ph\u00e1t tri\u1ec3n kh\u1ea3 n\u0103ng EQ &amp; Vi\u1ec7t Nam *B\u1ea1n ch\u01b0a ch\u1ecdn b\u1ea5t k\u1ef3 m\u1ee5c n\u00e0o! \u0110\u0103ng k\u00fd t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Toi_thieu_cua_boi_so_chung_va_nho_nhat_la_bao_nhieu\"><\/span>T\u1ed1i thi\u1ec3u c\u1ee7a b\u1ed9i s\u1ed1 chung v\u00e0 nh\u1ecf nh\u1ea5t l\u00e0 bao nhi\u00eau?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong ch\u01b0\u01a1ng tr\u00ecnh ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc l\u1edbp 6, h\u1ecd s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen v\u00e0 h\u1ecdc c\u00e1c b\u00e0i h\u1ecdc v\u1ec1 b\u1ed9i s\u1ed1 chung v\u00e0 s\u1ed1 ph\u1ed5 bi\u1ebfn nh\u1ecf nh\u1ea5t. C\u1ee5 th\u1ec3:<\/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\/boi-chung-nho-nhat-1.png\" alt=\"Nhi\u1ec1u ng\u01b0\u1eddi v\u00e0 BCNN l\u00e0 m\u1ed9t h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc c\u01a1 b\u1ea3n \u1edf l\u1edbp 6. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Nhieu_cai_chung_la_gi\"><\/span>Nhi\u1ec1u c\u00e1i chung l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Nhi\u1ec1u ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c s\u1ed1 nguy\u00ean d\u01b0\u01a1ng chia cho hai ho\u1eb7c nhi\u1ec1u s\u1ed1 nguy\u00ean kh\u00e1c nhau. C\u1ee5 th\u1ec3, \u0111\u1ed1i v\u1edbi s\u1ed1 1 t\u1ef1 nhi\u00ean chia cho s\u1ed1 B t\u1ef1 nhi\u00ean, t\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, ch\u00fang ta bi\u1ebft A l\u00e0 b\u1ed9i c\u1ee7a b.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Boi_so_chung_nho_nhat_la_gi\"><\/span>B\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Nhi\u1ec1u t\u1ed5ng s\u1ed1 nh\u1ecf nh\u1ea5t (BCNN) c\u1ee7a hai s\u1ed1 nguy\u00ean A v\u00e0 B \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 s\u1ed1 nguy\u00ean d\u01b0\u01a1ng nh\u1ecf nh\u1ea5t c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chia th\u00e0nh a v\u00e0 b. \u0110\u00f3 l\u00e0, BCNN l\u00e0 nh\u1eefng con s\u1ed1 c\u00f3 th\u1ec3 chia h\u1ebft cho A v\u00e0 B m\u00e0 kh\u00f4ng c\u00f3 d\u01b0 th\u1eeba. Trong tr\u01b0\u1eddng h\u1ee3p, n\u1ebfu A ho\u1eb7c B b\u1eb1ng 0 s\u1ebd kh\u00f4ng t\u1ed3n t\u1ea1i bcnn.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bieu_tuong\"><\/span>Bi\u1ec3u t\u01b0\u1ee3ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">B\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t c\u1ee7a hai s\u1ed1 A v\u00e0 B s\u1ebd \u0111\u01b0\u1ee3c t\u01b0\u1ee3ng tr\u01b0ng nh\u01b0 sau: [a, b]Bcnn (a, b). <\/p>\n<p dir=\"ltr\">V\u00ed d\u1ee5: <em>Bcnn (5, 10, 20) = bcnn (5, 10), bcnn (10, 2) = 20;<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Khi_nao_tim_BCNN_cua_hai_so\"><\/span>Khi n\u00e0o t\u00ecm BCNN c\u1ee7a hai s\u1ed1?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Tr\u01b0\u1edbc khi t\u00ecm hi\u1ec3u l\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ecm c\u00e1c b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t trong L\u1edbp 6, n\u00f3 \u0111\u00f2i h\u1ecfi tr\u1ebb ph\u1ea3i bi\u1ebft khi n\u00e0o n\u00ean t\u00ecm BCNN. C\u1ee5 th\u1ec3, BCNN c\u1ee7a hai s\u1ed1 l\u00e0 lo\u1ea1i ki\u1ebfn \u200b\u200bth\u1ee9c \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong nhi\u1ec1u b\u00e0i t\u1eadp kh\u00e1c nhau t\u1eeb lo\u1ea1i s\u1ed1 nguy\u00ean, d\u1ea1ng phong ph\u00fa, d\u1ea1ng ph\u00e2n s\u1ed1, &#8230; \u0111\u1ec3 c\u00f3 th\u1ec3 r\u00fat ng\u1eafn s\u1ed1 nhanh.<\/p>\n<p dir=\"ltr\">C\u1ee5 th\u1ec3, d\u01b0\u1edbi d\u1ea1ng to\u00e1n h\u1ecdc \u0111\u01b0\u1ee3c n\u00e9n ch\u1eb7t, vi\u1ec7c t\u00ecm BCNN gi\u00fap r\u1ea5t nhi\u1ec1u \u0111\u1ec3 c\u00f3 th\u1ec3 \u0111\u01b0a ph\u00e2n s\u1ed1 \u0111\u00f3 \u0111\u1ebfn d\u1ea1ng t\u1ed1i thi\u1ec3u nh\u1ea5t \u0111\u1ec3 th\u1ef1c hi\u1ec7n t\u00ednh to\u00e1n nhanh h\u01a1n. V\u00e0 c\u00e1c v\u1ea5n \u0111\u1ec1 c\u1ee7a s\u1ed1 nguy\u00ean c\u0169ng c\u00f3 th\u1ec3 t\u00ecm th\u1ea5y BCNN \u0111\u1ec3 t\u00ednh to\u00e1n d\u1ec5 d\u00e0ng h\u01a1n.<\/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\/boi-chung-nho-nhat-2.jpg\" alt=\"M\u1ed9t s\u1ed1 h\u00ecnh th\u1ee9c to\u00e1n h\u1ecdc \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 t\u00ecm BCNN \u0111\u1ec3 gi\u00fap t\u00ednh to\u00e1n nhanh h\u01a1n. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Lam_the_nao_de_tim_ra_boi_so_chung_nho_nhat_trong_lop_6\"><\/span>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ecm ra b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t trong l\u1edbp 6?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong to\u00e1n h\u1ecdc c\u1ee7a b\u1ed9i s\u1ed1 l\u1edbp 6 v\u00e0 b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t, \u0111\u1ec3 t\u00ecm BCNN c\u1ee7a hai ho\u1eb7c nhi\u1ec1u s\u1ed1 l\u1edbn h\u01a1n 1, m\u1ecdi ng\u01b0\u1eddi ch\u1ec9 c\u1ea7n \u00e1p d\u1ee5ng trong 3 b\u01b0\u1edbc sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 1: Th\u1ef1c hi\u1ec7n t\u1eebng y\u1ebfu t\u1ed1 c\u1ee7a c\u00e1c y\u1ebfu t\u1ed1 ch\u00ednh.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 2: 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: B\u1eaft \u0111\u1ea7u thi\u1ebft l\u1eadp c\u00e1c y\u1ebfu t\u1ed1 \u0111\u00e3 ch\u1ecdn, sau \u0111\u00f3 m\u1ed7i y\u1ebfu t\u1ed1 th\u1ef1c hi\u1ec7n v\u1edbi s\u1ed1 m\u0169 l\u1edbn nh\u1ea5t c\u1ee7a n\u00f3. T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, s\u1ea3n ph\u1ea9m \u0111\u00f3 l\u00e0 BCNN \u0111\u00e3 t\u00ecm ki\u1ebfm.<\/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\/boi-chung-nho-nhat-3.jpg\" alt=\"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ecm BCNN c\u0169ng kh\u00e1 \u0111\u01a1n gi\u1ea3n. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Ch\u00fa \u00fd:<\/p>\n<ul>\n<li dir=\"ltr\">N\u1ebfu c\u00e1c s\u1ed1 \u0111\u00e3 cho m\u1ed7i c\u1eb7p ph\u1ea7n t\u1eed l\u1ea1i v\u1edbi nhau, t\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, BCNN c\u1ea7n t\u00ecm l\u00e0 s\u1ea3n ph\u1ea9m c\u1ee7a nh\u1eefng con s\u1ed1 \u0111\u00f3.<\/li>\n<li dir=\"ltr\">V\u1edbi c\u00e1c s\u1ed1 \u0111\u00e3 cho, n\u1ebfu s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 b\u1ed9i s\u1ed1 chung c\u1ee7a ph\u1ea7n c\u00f2n l\u1ea1i, BCNN c\u1ea7n t\u00ecm l\u00e0 s\u1ed1 l\u1edbn nh\u1ea5t.<\/li>\n<\/ul>\n<p dir=\"ltr\">V\u00ed d\u1ee5:<\/p>\n<p dir=\"ltr\"><em>BCNN (5, 7) = 5,7 = 35. B\u1edfi v\u00ec 5 v\u00e0 7 l\u00e0 c\u00f9ng m\u1ed9t s\u1ed1 nguy\u00ean t\u1ed1, b\u00e2y gi\u1edd BCNN l\u00e0 s\u1ea3n ph\u1ea9m c\u1ee7a hai s\u1ed1 \u0111\u00f3 l\u00e0 35.<\/em><\/p>\n<p dir=\"ltr\"><em>BCNN (8, 12, 96) = 96. B\u1edfi v\u00ec 96 chia t\u1ea5t c\u1ea3 8 v\u00e0 12, t\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, BCNN c\u1ea7n t\u00ecm 3 s\u1ed1 l\u00e0 s\u1ed1 l\u1edbn nh\u1ea5t l\u00e0 96.<\/em><\/p>\n<p dir=\"ltr\"><em>T\u00ecm gi\u00e1 tr\u1ecb c\u1ee7a BCNN (8,9,21).<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u1ea7u ti\u00ean, m\u1ecdi ng\u01b0\u1eddi c\u1ea7n ph\u00e2n t\u00edch c\u00e1c s\u1ed1 nguy\u00ean \u0111\u00e3 cho v\u00e0o d\u1ea1ng s\u1ed1 nguy\u00ean t\u1ed1 d\u01b0 th\u1eeba. V\u1edbi m\u1ed7i s\u1ed1 \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y, b\u1ea1n s\u1ebd t\u00ednh to\u00e1n c\u00f4ng su\u1ea5t cao nh\u1ea5t, s\u1ea3n ph\u1ea9m c\u1ee7a h\u1ecd l\u00e0 BCNN \u0111ang t\u00ecm ki\u1ebfm. C\u1ee5 th\u1ec3, 2, 3, 5 v\u00e0 7, b\u01b0\u1edbc cao nh\u1ea5t t\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y l\u1ea7n l\u01b0\u1ee3t l\u00e0 23, 32, 30 v\u00e0 71. T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, ch\u00fang t\u00f4i t\u00ecm th\u1ea5y BCNN (8, 9, 21) ph\u1ea3i 8.9.1.7 = 504.<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_dang_boi_so_nho_nhat_va_nhieu_bai_tap_o_lop_6\"><\/span>C\u00e1c d\u1ea1ng b\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t v\u00e0 nhi\u1ec1u b\u00e0i t\u1eadp \u1edf l\u1edbp 6<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ed1i v\u1edbi c\u00e1c b\u1ed9i s\u1ed1 v\u00e0 b\u1ed9i s\u1ed1 nh\u1ecf nh\u1ea5t c\u1ee7a l\u1edbp 6, s\u1ebd c\u00f3 nhi\u1ec1u lo\u1ea1i b\u00e0i t\u1eadp kh\u00e1c nhau \u0111\u1ec3 ch\u00fang chinh ph\u1ee5c, c\u1ee5 th\u1ec3: c\u1ee5 th\u1ec3:<\/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\/boi-chung-nho-nhat-4.jpg\" alt=\"C\u00f3 nhi\u1ec1u lo\u1ea1i k\u1ebft qu\u1ea3 to\u00e1n h\u1ecdc \u0111\u1ec3 h\u1ecdc sinh th\u1ef1c h\u00e0nh. (\u1ea2nh: B\u1ed9 s\u01b0u t\u1eadp Internet)\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_1_Loai_phat_hien_BCNN_cua_mot_so_duoc_dua_ra_truoc\"><\/span>M\u1eabu 1: Lo\u1ea1i ph\u00e1t hi\u1ec7n BCNN c\u1ee7a m\u1ed9t s\u1ed1 \u0111\u01b0\u1ee3c \u0111\u01b0a ra tr\u01b0\u1edbc  <span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">V\u1edbi lo\u1ea1i b\u00e0i t\u1eadp n\u00e0y, sinh vi\u00ean s\u1ebd t\u00ecm th\u1ea5y b\u1ed9i s\u1ed1 ph\u1ed5 bi\u1ebfn nh\u1ecf nh\u1ea5t c\u1ee7a 2 con s\u1ed1 tr\u1edf l\u00ean. Gi\u1ea3i ph\u00e1p c\u0169ng kh\u00e1 \u0111\u01a1n gi\u1ea3n, h\u1ecd ch\u1ec9 c\u1ea7n \u00e1p d\u1ee5ng c\u00e1ch nh\u1ecf nh\u1ea5t \u0111\u1ec3 t\u00ecm l\u1edbp 6 \u1edf l\u1edbp 6 tr\u00ean s\u1ebd t\u00ecm th\u1ea5y c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ecm BCNN c\u1ee7a 30 v\u00e0 150<\/em><\/p>\n<p dir=\"ltr\"><em>Gi\u1ea3i th\u01b0\u1edfng: BCNN (30, 150) = 150 v\u00ec 150 \u0111\u01b0\u1ee3c chia cho 30;<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_2_Van_de_la_tim_ra_bcnn_cua_mot_so\"><\/span>M\u1eabu 2: V\u1ea5n \u0111\u1ec1 l\u00e0 t\u00ecm ra bcnn c\u1ee7a m\u1ed9t s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">V\u1edbi h\u00ecnh th\u1ee9c t\u00ecm ki\u1ebfm nh\u1ecf nh\u1ea5t n\u00e0y, h\u1ecd c\u1ea7n ph\u00e2n t\u00edch v\u1ea5n \u0111\u1ec1, v\u00e0 sau \u0111\u00f3 b\u1eaft \u0111\u1ea7u suy lu\u1eadn v\u1ec1 vi\u1ec7c t\u00ecm ki\u1ebfm BCNN t\u1eeb 2 ho\u1eb7c ch\u00ednh x\u00e1c h\u01a1n.<\/p>\n<p dir=\"ltr\">Trong h\u00ecnh th\u1ee9c n\u00e0y, b\u1ea1n ph\u1ea3i ph\u00e2n t\u00edch v\u1ea5n \u0111\u1ec1, suy lu\u1eadn \u0111\u1ec3 mang l\u1ea1i vi\u1ec7c t\u00ecm ki\u1ebfm BCNN c\u1ee7a hai ho\u1eb7c nhi\u1ec1u s\u1ed1.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: T\u00ecm s\u1ed1 t\u1ef1 nhi\u00ean nh\u1ecf nh\u1ea5t kh\u00e1c v\u1edbi 0, bi\u1ebft r\u1eb1ng A chia h\u1ebft cho 15 v\u00e0 18.<\/em><\/p>\n<p dir=\"ltr\"><em>Ph\u1ea7n th\u01b0\u1edfng:<\/em><\/p>\n<p dir=\"ltr\"><em>A chia h\u1ebft cho 15 v\u00e0 18, v\u00ec v\u1eady A \u0111\u01b0\u1ee3c coi l\u00e0 b\u1ed9i s\u1ed1 ph\u1ed5 bi\u1ebfn c\u1ee7a 15 v\u00e0 18.<\/em><\/p>\n<p dir=\"ltr\"><em>A l\u00e0 s\u1ed1 nh\u1ecf nh\u1ea5t ngo\u00e0i 0 v\u00ec v\u1eady ch\u00fang ta c\u00f3 th\u1ec3 suy ra BCNN (15, 18) = 90.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mau_3_Tim_BCNN_cua_hai_hoac_nhieu_so_de_dap_ung_mot_so_dieu_kien_nhat_dinh\"><\/span>M\u1eabu 3: T\u00ecm BCNN c\u1ee7a hai ho\u1eb7c nhi\u1ec1u s\u1ed1 \u0111\u1ec3 \u0111\u00e1p \u1ee9ng m\u1ed9t s\u1ed1 \u0111i\u1ec1u ki\u1ec7n nh\u1ea5t \u0111\u1ecbnh<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">V\u1edbi lo\u1ea1i b\u00e0i t\u1eadp n\u00e0y, h\u1ecd c\u0169ng c\u1ea7n ph\u00e2n t\u00edch v\u1ea5n \u0111\u1ec1, sau \u0111\u00f3 h\u1ecd s\u1ebd suy ra h\u00ecnh th\u1ee9c c\u1ee7a m\u1ed9t s\u1ed1 nh\u1ecf ho\u1eb7c nhi\u1ec1u s\u1ed1. \u0110\u1ea3m b\u1ea3o:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm BCNN c\u1ee7a nh\u1eefng con s\u1ed1 \u0111\u00f3;<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">T\u00ecm nhi\u1ec1u BCNN n\u00e0y;<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ch\u1ecdn trong s\u1ed1 h\u1ecd \u0111\u1ec3 \u0111\u00e1p \u1ee9ng c\u00e1c \u0111i\u1ec1u ki\u1ec7n nh\u1ea5t \u0111\u1ecbnh.<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: H\u1ecdc sinh h\u1ecdc l\u1edbp 6A khi x\u1ebfp h\u00e0ng 2, 3, 4 v\u00e0 8 l\u00e0 \u0111\u1ee7. Bi\u1ebft r\u1eb1ng, s\u1ed1 l\u01b0\u1ee3ng h\u1ecdc sinh trong L\u1edbp 6A l\u00e0 kho\u1ea3ng 35 &#8211; 60 h\u1ecdc sinh. T\u1ed5ng s\u1ed1 h\u1ecdc sinh trong L\u1edbp 6A l\u00e0 bao nhi\u00eau?<\/em><\/p>\n<p dir=\"ltr\"><em>Ph\u1ea7n th\u01b0\u1edfng:<\/em><\/p>\n<p dir=\"ltr\"><em>D\u1ef1a tr\u00ean v\u1ea5n \u0111\u1ec1, ch\u00fang t\u00f4i bi\u1ebft r\u1eb1ng s\u1ed1 l\u01b0\u1ee3ng h\u1ecdc sinh trong L\u1edbp 6A ph\u1ea3i \u0111\u01b0\u1ee3c chia cho 2, 3, 4 v\u00e0 8. T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, ch\u00fang t\u00f4i ph\u1ea3i t\u00ecm s\u1ed1 l\u01b0\u1ee3ng b\u1ed9i s\u1ed1 c\u1ee7a c\u00e1c s\u1ed1 \u0111\u00f3. C\u1ee5 th\u1ec3:<\/em><\/p>\n<p dir=\"ltr\"><em>BCNN (2, 3, 4, 8) = 24; Suy lu\u1eadn, b (24) = {0; 24; 48; 72; 96; &#8230;}<\/em><\/p>\n<p dir=\"ltr\"><em>B\u00ean c\u1ea1nh \u0111\u00f3, v\u1ea5n \u0111\u1ec1 c\u0169ng cung c\u1ea5p cho sinh vi\u00ean l\u1edbp 6A trong ph\u1ea1m vi 35 &#8211; 60, v\u00ec v\u1eady v\u1edbi s\u1ed1 B (24) tr\u00ean ch\u1ec9 48 \u0111\u01b0\u1ee3c th\u1ecfa m\u00e3n. T\u1ea1i th\u1eddi \u0111i\u1ec3m n\u00e0y, t\u1ed5ng s\u1ed1 h\u1ecdc sinh trong L\u1edbp 6A l\u00e0 48.<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_bai_tap_chung_nho_nhat_o_lop_6_de_tre_thuc_hanh\"><\/span>C\u00e1c b\u00e0i t\u1eadp chung nh\u1ecf nh\u1ea5t \u1edf l\u1edbp 6 \u0111\u1ec3 tr\u1ebb th\u1ef1c h\u00e0nh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp to\u00e1n h\u1ecdc th\u1ee9 6 v\u00e0 n\u00f3i chung nh\u1ecf nh\u1ea5t \u0111\u1ec3 tr\u1ebb th\u1ef1c h\u00e0nh hi\u1ec7u qu\u1ea3.<\/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\/boi-chung-nho-nhat-5.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 v\u1ec1 ki\u1ebfn \u200b\u200bth\u1ee9c chung v\u00e0 l\u1edbp 6 nh\u1ecf nh\u1ea5t. \u0110\u00e2y l\u00e0 m\u1ed9t h\u00ecnh th\u1ee9c ki\u1ebfn \u200b\u200bth\u1ee9c quan tr\u1ecdng, th\u01b0\u1eddng s\u1ebd xu\u1ea5t hi\u1ec7n trong nhi\u1ec1u c\u00e2u h\u1ecfi thi, v\u00ec v\u1eady h\u1ecd c\u1ea7n th\u1ef1c h\u00e0nh, \u00e1p d\u1ee5ng c\u00e1ch t\u00ecm th\u1ea5y con kh\u1ec9 chia s\u1ebb \u1edf tr\u00ean \u0111\u1ec3 c\u00f3 th\u1ec3 chinh ph\u1ee5c \u0111i\u1ec1u n\u00e0y m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nhi\u1ec1u l\u1edbp 6 nh\u1ecf nh\u1ea5t l\u00e0 m\u1ed9t trong nh\u1eefng ki\u1ebfn \u200b\u200bth\u1ee9c to\u00e1n h\u1ecdc c\u01a1 b\u1ea3n m\u00e0 h\u1ecd s\u1ebd l\u00e0m quen, h\u1ecdc v\u00e0 l\u00e0m b\u00e0i t\u1eadp v\u1ec1 nh\u00e0. \u0110\u1ed3ng th\u1eddi, \u0111\u00e2y c\u0169ng l\u00e0 h\u00ecnh th\u1ee9c c\u1ee7a c\u00e1c b\u00e0i t\u1eadp xu\u1ea5t hi\u1ec7n trong c\u00e1c k\u1ef3 thi. V\u1eady b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t l\u00e0 g\u00ec? L\u00e0m th\u1ebf n\u00e0o&#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-18549","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/18549","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=18549"}],"version-history":[{"count":1,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/18549\/revisions"}],"predecessor-version":[{"id":23832,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/18549\/revisions\/23832"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=18549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=18549"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=18549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}