{"id":25468,"date":"2021-12-24T16:52:21","date_gmt":"2021-12-24T09:52:21","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25468"},"modified":"2021-12-24T16:52:21","modified_gmt":"2021-12-24T09:52:21","slug":"bai-so-6-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-6-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 6 – \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"

<\/a>C\u00c2U 1:<\/h3>\n

Ch\u1ecdn l\u1ea5y m\u1ed9t trong n\u0103m h\u00ecnh th\u00edch h\u1ee3p nh\u1ea5t l\u1eafp v\u00e0o \u00f4 tr\u1ed1ng:<\/p>\n

\"14_1.jpg\"<\/p>\n

<\/a>C\u00c2U 2:<\/h3>\n

Cho b\u1ea3ng k\u1ebb 5 x 5 \u00f4 vu\u00f4ng. Hai b\u1ea1n Th\u1eafng v\u00e0 Long ch\u01a1i theo quy t\u1eafc sau: \u0110\u1ebfn l\u01b0\u1ee3t m\u00ecnh \u0111i th\u00ec ng\u01b0\u1eddi th\u1ee9 hai ph\u1ea3i \u0111\u00e1nh d\u1ea5u v\u00e0o \u00f4 c\u00f3 m\u1ed9t c\u1ea1nh chung v\u1edbi \u00f4 c\u1ee7a ng\u01b0\u1eddi th\u1ee9 nh\u1ea5t v\u1eeba \u0111\u00e1nh d\u1ea5u. Ng\u01b0\u1eddi n\u00e0o kh\u00f4ng c\u00f3 c\u00e1ch \u0111\u1ec3 \u0111i n\u1eefa th\u00ec thua cu\u1ed9c. Th\u1eafng \u0111i tr\u01b0\u1edbc.<\/p>\n

H\u00e3y ch\u1ec9 ra c\u00e1ch \u0111i \u0111\u1ec3 Th\u1eafng ch\u1eafc ch\u1eafn th\u1eafng Long trong cu\u1ed9c ch\u01a1i n\u00e0y.<\/p>\n

\"14_2.jpg\"<\/p>\n

<\/a>C\u00c2U 3:<\/h3>\n

M\u1ed9t con \u1ed1c s\u00ean b\u00f2 l\u00ean m\u1ed9t c\u00e1i c\u00e2y d\u00e0i 20m, ng\u00e0y tr\u00e8o 4m, \u0111\u00eam v\u00ec ng\u1ee7 qu\u00ean n\u00ean tu\u1ed9t xu\u1ed1ng m\u1ea5t 2m. Theo c\u00e1c b\u1ea1n sau bao nhi\u00eau ng\u00e0y, \u0111\u00eam \u1ed1c s\u00ean b\u00f2 l\u00ean t\u1edbi ng\u1ecdn c\u00e2y?<\/p>\n

<\/a>C\u00c2U 4:<\/h3>\n

Th\u00e0nh ph\u1ed1 A \u0111\u1ebfn th\u00e0nh ph\u1ed1 B<\/p>\n

\u0110i qua th\u1ecb tr\u1ea5n C th\u1eb3ng \u0111\u01b0\u1eddng<\/p>\n

Tr\u0103m r\u01b0\u1ee1i c\u00e2y s\u1ed1 \u0111\u01b0\u1eddng tr\u01b0\u1eddng<\/p>\n

AC b\u1eb1ng n\u1eeda qu\u00e3ng \u0111\u01b0\u1eddng BC<\/p>\n

Xe \u0111i t\u1eeb A \u0111\u1ebfn B<\/p>\n

R\u1ed3i li\u1ec1n quay ng\u01b0\u1ee3c tr\u1edf v\u1ec1 \u0111\u1ebfn C<\/p>\n

B\u1ea1n \u01a1i nh\u1edb \u0111\u1ecdc k\u0129 \u0111\u1ec1<\/p>\n

Bao nhi\u00eau c\u00e2y s\u1ed1 \u0111i v\u1ec1 xe \u0111\u00e2y?<\/p>\n

<\/a>C\u00c2U 5:<\/h3>\n

\u0110u\u00f4i con c\u00e1 n\u1eb7ng 250g, \u0111\u1ea7u c\u00e1 n\u1eb7ng b\u1eb1ng \u0111u\u00f4i v\u00e0 b\u1eb1ng n\u1eeda th\u00e2n, th\u00e2n c\u00e1 n\u1eb7ng b\u1eb1ng \u0111\u1ea7u, b\u1eb1ng \u0111u\u00f4i. H\u1ecfi con c\u00e1 \u0111\u00f3 n\u1eb7ng m\u1ea5y kg?<\/p>\n

\"15.jpg\"<\/p>\n

H\u01af\u1edaNG D\u1eaaN – B\u00c0I GI\u1ea2I – \u0110\u00c1P S\u1ed0<\/h1>\n

<\/a>B\u00c0I S\u1ed0 6<\/h2>\n

<\/a>C\u00c2U 1:<\/h3>\n

\u0110\u00e1p s\u1ed1: l\u00e0 c\u00e2u d<\/p>\n

\"108.jpg\"<\/p>\n

<\/a>C\u00c2U 2:<\/h3>\n

\u0110\u00e1nh s\u1ed1 t\u1eeb 1 \u0111\u1ebfn 25 v\u00e0o c\u00e1c \u00f4 trong b\u1ea3ng, ta c\u00f3 12 \u00f4 mang s\u1ed1 ch\u1eb5n v\u00e0 13 \u00f4 mang s\u1ed1 l\u1ebb v\u00e0 c\u00e1c \u00f4 ch\u1eb5n s\u00e1t li\u1ec1n v\u1edbi c\u00e1c \u00f4 mang s\u1ed1 l\u1ebb. N\u1ebfu b\u1ea1n Th\u1eafng \u0111\u00e1nh d\u1ea5u v\u00e0o \u00f4 l\u1ebb th\u00ec b\u1ea1n Long ph\u1ea3i \u0111\u00e1nh d\u1ea5u v\u00e0o \u00f4 ch\u1eb5n, sau \u0111\u00f3 b\u1ea1n Th\u1eafng l\u1ea1i s\u1ebd \u0111\u00e1nh d\u1ea5u v\u00e0o \u00f4 l\u1ebb…; ho\u1eb7c n\u1ebfu b\u1ea1n Th\u1eafng \u0111\u00e1nh d\u1ea5u v\u00e0o \u00f4 ch\u1eb5n th\u00ec b\u1ea1n Long s\u1ebd \u0111\u00e1nh d\u1ea5u v\u00e0o \u00f4 l\u1ebb, sau \u0111\u00f3 b\u1ea1n Th\u1eafng l\u1ea1i \u0111\u00e1nh d\u1ea5u v\u00e0o \u00f4 ch\u1eb5n\u2026<\/p>\n

Nh\u01b0 v\u1eady \u0111\u1ec3 l\u00e0 ng\u01b0\u1eddi \u0111i cu\u1ed1i c\u00f9ng th\u00ec Th\u1eafng ph\u1ea3i ch\u1ecdn \u00f4 l\u1ebb, c\u00f3 13 b\u01b0\u1edbc \u0111i, c\u00f2n \u00f4 ch\u1eb5n ch\u1ec9 c\u00f3 12 b\u01b0\u1edbc \u0111i. Th\u1eafng c\u00f3 th\u1ec3 ch\u1ecdn b\u1ea5t c\u1ee9 \u00f4 l\u1ebb n\u00e0o trong b\u1ea3ng \u0111\u1ec3 \u0111\u00e1nh d\u1ea5u tr\u01b0\u1edbc th\u00ec b\u1ea1n \u0111\u00f3 s\u1ebd th\u1eafng.<\/p>\n

\"109.jpg\"<\/p>\n

<\/a>C\u00c2U 3:<\/h3>\n

B\u00e0i gi\u1ea3i:<\/p>\n

9 ng\u00e0y 8 \u0111\u00eam, sau 8 ng\u00e0y \u1ed1c s\u00ean leo \u0111\u01b0\u1ee3c 16m, s\u00e1ng ng\u00e0y th\u1ee9 9 leo th\u00eam 4m n\u1eefa l\u00e0 \u0111\u1ee7.<\/p>\n

<\/a>C\u00c2U 4:<\/h3>\n

\"110.jpg\"<\/p>\n

B\u00e0i gi\u1ea3i:<\/p>\n

Qu\u00e3ng \u0111\u01b0\u1eddng AC d\u00e0i l\u00e0:<\/p>\n

150 : 3 = 50 (km)<\/p>\n

Qu\u00e3ng \u0111\u01b0\u1eddng BC d\u00e0i l\u00e0:<\/p>\n

150 \u2013 50 = 100 (km)<\/p>\n

Qu\u00e3ng \u0111\u01b0\u1eddng xe ch\u1ea1y c\u1ea3 \u0111i l\u1eabn v\u1ec1 l\u00e0:<\/p>\n

150 + 100 = 250 (km)<\/p>\n

\u0110\u00e1p s\u1ed1: 250 (km).<\/p>\n

<\/a>C\u00c2U 5:<\/h3>\n

B\u00e0i gi\u1ea3i:<\/p>\n

\u0110\u1ea7u n\u1eb7ng b\u1eb1ng \u0111u\u00f4i v\u00e0 b\u1eb1ng n\u1eeda th\u00e2n.<\/p>\n

Th\u00e2n n\u1eb7ng b\u1eb1ng \u0111\u1ea7u, b\u1eb1ng \u0111u\u00f4i.<\/p>\n

V\u1eady th\u00e2n n\u1eb7ng b\u1eb1ng hai \u0111u\u00f4i v\u00e0 m\u1ed9t n\u1eeda th\u00e2n.<\/p>\n

Suy ra m\u1ed9t n\u1eeda th\u00e2n n\u1eb7ng b\u1eb1ng 2 \u0111u\u00f4i.<\/p>\n

V\u1eady n\u1eeda th\u00e2n c\u00e1 n\u1eb7ng 250 x 2 = 500(g)<\/p>\n

C\u1ea3 th\u00e2n c\u00e1 n\u1eb7ng:<\/p>\n

500 x 2 = 1000(g) hay 1kg.<\/p>\n

C\u1ea3 con c\u00e1 n\u1eb7ng<\/p>\n

1 + 1 = 2kg<\/p>\n

\u0110\u00e1p s\u1ed1: 2kg.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U 1: Ch\u1ecdn l\u1ea5y m\u1ed9t trong n\u0103m h\u00ecnh th\u00edch h\u1ee3p nh\u1ea5t l\u1eafp v\u00e0o \u00f4 tr\u1ed1ng: C\u00c2U 2: Cho b\u1ea3ng k\u1ebb 5 x 5 \u00f4 vu\u00f4ng. Hai b\u1ea1n Th\u1eafng v\u00e0 Long ch\u01a1i theo quy t\u1eafc sau: \u0110\u1ebfn l\u01b0\u1ee3t m\u00ecnh \u0111i th\u00ec ng\u01b0\u1eddi th\u1ee9 hai ph\u1ea3i \u0111\u00e1nh d\u1ea5u v\u00e0o \u00f4 c\u00f3 m\u1ed9t c\u1ea1nh chung v\u1edbi \u00f4 c\u1ee7a […]<\/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":[47],"tags":[],"class_list":["post-25468","post","type-post","status-publish","format-standard","hentry","category-do-vui"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25468","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=25468"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25468\/revisions"}],"predecessor-version":[{"id":25475,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25468\/revisions\/25475"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25468"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25468"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25468"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}