{"id":7503,"date":"2021-11-20T13:55:39","date_gmt":"2021-11-20T06:55:39","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=7503"},"modified":"2021-11-20T15:09:08","modified_gmt":"2021-11-20T08:09:08","slug":"vi-sao-nguoi-ta-khong-noi-den-uoc-so-chung-nho-nhat-va-boi-so-chung-lon-nhat","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/vi-sao-nguoi-ta-khong-noi-den-uoc-so-chung-nho-nhat-va-boi-so-chung-lon-nhat\/","title":{"rendered":"V\u00ec sao ng\u01b0\u1eddi ta kh\u00f4ng n\u00f3i \u0111\u1ebfn \u01b0\u1edbc s\u1ed1 chung nh\u1ecf nh\u1ea5t v\u00e0 b\u1ed9i s\u1ed1 chung l\u1edbn nh\u1ea5t?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Khi h\u1ecdc to\u00e1n, ch\u00fang ta \u0111\u00e3 h\u1ecdc \u01b0\u1edbc s\u1ed1 chung l\u1edbn nh\u1ea5t v\u00e0 b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t. Th\u1ebf nh\u01b0ng c\u00e1c b\u1ea1n c\u00f3 \u0111\u1eb7t ra c\u00e2u h\u1ecfi t\u1ea1i sao ng\u01b0\u1eddi ta hay n\u00f3i \u0111\u1ebfn \u01b0\u1edbc s\u1ed1 chung l\u1edbn nh\u1ea5t v\u00e0 b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t m\u00e0 kh\u00f4ng n\u00f3i \u0111\u1ebfn \u01b0\u1edbc s\u1ed1 chung nh\u1ecf nh\u1ea5t v\u00e0 b\u1ed9i s\u1ed1 chung l\u1edbn nh\u1ea5t kh\u00f4ng? Li\u1ec7u c\u00f3 ph\u1ea3i kh\u00f4ng c\u00f3 \u01b0\u1edbc s\u1ed1 chung nh\u1ecf nh\u1ea5t v\u00e0 b\u1ed9i s\u1ed1 chung l\u1edbn nh\u1ea5t n\u00ean ng\u01b0\u1eddi ta kh\u00f4ng b\u00e0n \u0111\u1ebfn v\u1ea5n \u0111\u1ec1 \u0111\u00f3?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc h\u1ebft ch\u00fang ta xem hai t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3 sau \u0111\u00e2y:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">X\u00e9t c\u00e1c s\u1ed1 16 v\u00e0 24, ch\u00fang c\u00f3 c\u00e1c \u01b0\u1edbc s\u1ed1 1, 2, 4, 8 \u01b0\u1edbc s\u1ed1 l\u1edbn chung nh\u1ea5t l\u00e0 8 v\u00e0 nh\u1ecf nh\u1ea5t l\u00e0 1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f2n v\u1edbi c\u00e1c s\u1ed1 nguy\u00ean 15 v\u00e0 56 ch\u00fang ch\u1ec9 c\u00f3 m\u1ed9t \u01b0\u1edbc s\u1ed1 l\u00e0 1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u01af\u1edbc s\u1ed1 chung l\u1edbn nh\u1ea5t c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong ph\u00e9p t\u00ednh v\u1edbi c\u00e1c ph\u00e2n s\u1ed1. Nh\u1edd c\u00f3 \u01b0\u1edbc s\u1ed1 chung l\u1edbn nh\u1ea5t m\u00e0 ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 thu g\u1ecdn c\u00e1c ph\u00e2n s\u1ed1 th\u00e0nh c\u00e1c ph\u00e2n s\u1ed1 t\u1ed1i gi\u1ea3n, c\u00f2n \u01b0\u1edbc s\u1ed1 chung nh\u1ecf nh\u1ea5t th\u00ec ch\u1ea3 d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec, v\u00ec v\u1eady ng\u01b0\u1eddi ta \u00edt khi b\u00e0n \u0111\u1ebfn \u01b0\u1edbc s\u1ed1 chung nh\u1ecf nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ebf nh\u01b0ng c\u00f3 ph\u1ea3i hai s\u1ed1 nguy\u00ean b\u1ea5t k\u00ec kh\u00f4ng c\u00f3 b\u1ed9i s\u1ed1 chung l\u1edbn nh\u1ea5t? V\u00ed d\u1ee5 x\u00e9t hai s\u1ed1 16 v\u00e0 24, b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t c\u1ee7a hai s\u1ed1 n\u00e0y l\u00e0 48. T\u1ea5t c\u1ea3 c\u00e1c b\u1ed9i s\u1ed1 c\u1ee7a 48 \u0111\u1ec1u l\u00e0 b\u1ed9i s\u1ed1 chung c\u1ee7a hai s\u1ed1 16 v\u00e0 24, v\u00ed nh\u01b0 48 x 2 = 96, 48 x 3 = 144, 48 x 4 = 192, 48 x 1000 = 48000 v.v.. \u0111\u1ec1u l\u00e0 b\u1ed9i s\u1ed1 chung c\u1ee7a hai s\u1ed1 16 v\u00e0 24. V\u00ec v\u1eady c\u00e1c s\u1ed1 t\u1ef1 nhi\u00ean kh\u00f4ng c\u00f3 b\u1ed9i s\u1ed1 chung l\u1edbn nh\u1ea5t.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong th\u1ef1c t\u1ebf khi t\u00ednh to\u00e1n v\u1edbi c\u00e1c ph\u00e2n s\u1ed1, ng\u01b0\u1eddi ta ch\u1ec9 c\u1ea7n \u0111\u1ebfn b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t khi ti\u1ebfn h\u00e0nh quy \u0111\u1ed3ng m\u1eabu s\u1ed1. Khi \u0111\u00e3 kh\u00f4ng c\u1ea7n \u0111\u1ebfn b\u1ed9i s\u1ed1 chung l\u1edbn nh\u1ea5t th\u00ec c\u0169ng ch\u1eb3ng c\u1ea7n b\u00e0n \u0111\u1ebfn b\u1ed9i s\u1ed1 chung l\u1edbn nh\u1ea5t l\u00e0m g\u00ec.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1eeb kho\u00e1: \u01af\u1edbc s\u1ed1 chung v\u00e0 b\u1ed9i s\u1ed1 chung.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Khi h\u1ecdc to\u00e1n, ch\u00fang ta \u0111\u00e3 h\u1ecdc \u01b0\u1edbc s\u1ed1 chung l\u1edbn nh\u1ea5t v\u00e0 b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t. Th\u1ebf nh\u01b0ng c\u00e1c b\u1ea1n c\u00f3 \u0111\u1eb7t ra c\u00e2u h\u1ecfi t\u1ea1i sao ng\u01b0\u1eddi ta hay n\u00f3i \u0111\u1ebfn \u01b0\u1edbc s\u1ed1 chung l\u1edbn nh\u1ea5t v\u00e0 b\u1ed9i s\u1ed1 chung nh\u1ecf nh\u1ea5t m\u00e0 kh\u00f4ng n\u00f3i \u0111\u1ebfn \u01b0\u1edbc s\u1ed1 chung nh\u1ecf nh\u1ea5t v\u00e0 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15,9],"tags":[],"class_list":["post-7503","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc","category-toan-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7503","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=7503"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/7503\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=7503"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=7503"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=7503"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}