{"id":25591,"date":"2021-12-24T17:26:01","date_gmt":"2021-12-24T10:26:01","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25591"},"modified":"2021-12-24T17:26:02","modified_gmt":"2021-12-24T10:26:02","slug":"bai-so-30-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-30-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 30 – \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"

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

T\u1eeb 6 h\u00ecnh \u0111\u01b0\u1ee3c \u0111\u00e1nh s\u1ed1 \u1edf d\u01b0\u1edbi h\u00e3y ch\u1ecdn m\u1ed9t h\u00ecnh th\u00edch h\u1ee3p \u0111\u1ec3 ho\u00e0n th\u00e0nh d\u00e3y ngang tr\u00ean?<\/p>\n

\"60.jpg\"<\/p>\n

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

M\u1ed9t c\u00e2y c\u1ed5 th\u1ee5 c\u00f3 100 c\u00e0nh. \u0111\u00e1nh s\u1ed1 th\u1ee9 t\u1ef1 t\u1eeb tr\u00ean ng\u1ecdn xu\u1ed1ng g\u1ed1c 1, 2… 100 l\u00e0 c\u00e0nh to nh\u1ea5t.<\/p>\n

Tr\u00ean c\u00e0nh s\u1ed1 1 c\u00f3 1 con chim \u0111\u1eadu, c\u00e0nh s\u1ed1 2 c\u00f3 2 con chim \u0111\u1eadu, c\u00e0nh th\u1ee9 3 c\u00f3 3 con chim \u0111\u1eadu… V\u00e0 c\u1ee9 th\u1ebf cho \u0111\u1ebfn c\u00e0nh th\u1ee9 100 c\u00f3 100 con chim \u0111\u1eadu.<\/p>\n

B\u1ea1n cho bi\u1ebft tr\u00ean c\u00e2y c\u00f3 t\u1ea5t c\u1ea3 bao nhi\u00eau con chim?<\/p>\n

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

C\u00f3 hai c\u00e2u sai. \u0110\u00f3 l\u00e0 c\u00e2u n\u00e0o v\u1eady?<\/p>\n

2 + 2 = 4<\/p>\n

(6 x 2,5) : 2 = 7,5<\/p>\n

210 – 34= 176<\/p>\n

64 : 8 =8<\/p>\n

5 x 7 = 34<\/p>\n

Gi\u1ea3i th\u00edch v\u00ec sao sai nh\u00e9?<\/p>\n

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

M\u1ed9t ng\u00f4i nh\u00e0 c\u00f3 4 con m\u00e8o tr\u01b0\u1edbc m\u1eb7t m\u1ed7i con m\u00e8o c\u00f3 3 con m\u00e8o, tr\u00ean \u0111u\u00f4i m\u1ed7i con m\u00e8o c\u00f3 1 con m\u00e8o. H\u1ecfi ng\u00f4i nh\u00e0 \u0111\u00f3 c\u00f3 m\u1ea5y con m\u00e8o?<\/p>\n

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

<\/a>B\u00c0I S\u1ed0 30<\/h2>\n

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

\u0110\u00e1p \u00e1n:<\/p>\n

Ta ch\u1ecdn h\u00ecnh 1 (m\u0169i t\u00ean di chuy\u1ec3n ng\u01b0\u1ee3c kim \u0111\u1ed3ng h\u1ed3 1 g\u00f3c 900, v\u00e0 m\u1ed7i l\u1ea7n di chuy\u1ec3n h\u00ecnh ch\u1eef th\u1eadp v\u00e0 v\u00f2ng tr\u00f2n nh\u1ecf \u0111\u1ed5i ch\u1ed7 cho nhau).<\/p>\n

\"159.jpg\"<\/p>\n

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

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

1+ 99 = 100<\/p>\n

2 + 98 = 100<\/p>\n

C\u00f3 t\u1ea5t c\u1ea3 l\u00e0 49 \u0111\u00f4i => (100 x 49) + 50 + 100 = 5050 con.<\/p>\n

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

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

C\u00f3 2 c\u00e2u sai l\u00e0: 7 x 5 = 34 v\u00e0 c\u00e2u n\u00f3i c\u1ee7a ng\u01b0\u1eddi ra b\u00e0i sai v\u00ec b\u00e0i t\u1eadp ch\u1ec9 c\u00f3 1 c\u00e2u sai th\u00f4i!<\/p>\n

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

\u0110\u00e1p s\u1ed1: c\u00f3 4 con.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U 1: T\u1eeb 6 h\u00ecnh \u0111\u01b0\u1ee3c \u0111\u00e1nh s\u1ed1 \u1edf d\u01b0\u1edbi h\u00e3y ch\u1ecdn m\u1ed9t h\u00ecnh th\u00edch h\u1ee3p \u0111\u1ec3 ho\u00e0n th\u00e0nh d\u00e3y ngang tr\u00ean? C\u00c2U 2: M\u1ed9t c\u00e2y c\u1ed5 th\u1ee5 c\u00f3 100 c\u00e0nh. \u0111\u00e1nh s\u1ed1 th\u1ee9 t\u1ef1 t\u1eeb tr\u00ean ng\u1ecdn xu\u1ed1ng g\u1ed1c 1, 2… 100 l\u00e0 c\u00e0nh to nh\u1ea5t. Tr\u00ean c\u00e0nh s\u1ed1 1 c\u00f3 1 con chim […]<\/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-25591","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\/25591","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=25591"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25591\/revisions"}],"predecessor-version":[{"id":25594,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25591\/revisions\/25594"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25591"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25591"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25591"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}