{"id":25486,"date":"2021-12-24T16:58:12","date_gmt":"2021-12-24T09:58:12","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25486"},"modified":"2021-12-24T16:58:12","modified_gmt":"2021-12-24T09:58:12","slug":"bai-so-9-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-9-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 9 – \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"

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

C\u00e1i n\u00e0o l\u1ea1c lo\u00e0i ?<\/p>\n

\"21_1.jpg\"<\/p>\n

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

C\u00e1i n\u00e0o l\u1ea1c lo\u00e0i?<\/p>\n

\"21_2.jpg\"<\/p>\n

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

H\u00ecnh n\u00e0o nh\u1ea3y v\u00e0o d\u1ea5u (?)<\/p>\n

\"21_3.jpg\"<\/p>\n

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

C\u00f3 7 nh\u00e0, m\u1ed7i nh\u00e0 c\u00f3 7 con m\u00e8o, m\u1ed7i con m\u00e8o \u0103n 7 con chu\u1ed9t, m\u1ed7i con chu\u1ed9t \u0103n 7 b\u00f4ng \u0111\u1ea1i m\u1ea1ch, m\u1ed7i b\u00f4ng c\u00f3 7 h\u1ea1t. T\u00ecm t\u1ed5ng s\u1ed1 nh\u00e0, m\u00e8o, chu\u1ed9t, b\u00f4ng, h\u1ea1t?.<\/p>\n

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

H\u00e3y so s\u00e1nh m\u1ed9t c\u00e2n b\u00f4ng v\u00e0 m\u1ed9t c\u00e2n s\u1eaft. C\u00e2n n\u00e0o n\u1eb7ng h\u01a1n?<\/p>\n

<\/a>C\u00c2U 6:<\/h3>\n

Chia cho T\u00ed, T\u00e8o<\/p>\n

24 vi\u00ean k\u1eb9o<\/p>\n

Ai chia gi\u00fap gi\u00f9m t\u00f4i<\/p>\n

Bi\u1ebft k\u1eb9o ph\u1ea7n T\u00ed g\u1ea5p \u0111\u00f4i ph\u1ea7n T\u00e8o<\/p>\n

\u0110\u1ed1 vui v\u1eeba h\u1ecdc v\u1eeba reo<\/p>\n

\u0110\u00e1p nhanh, \u0111\u00e1p tr\u00fang, huy ch\u01b0\u01a1ng \u0111eo, th\u01b0\u1edfng qu\u00e0.<\/p>\n

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

<\/a>B\u00c0I S\u1ed0 9<\/h2>\n

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

B\u1ea1n vi\u1ebft s\u1ed1 \u201cph\u1ea7n\u201d xu\u1ed1ng d\u01b0\u1edbi, ta th\u1ea5y ngay k\u1ebft qu\u1ea3: r\u00f5 r\u00e0ng l\u00e0 anh ch\u00e0ng d \u201cchen ngang\u201d r\u1ed3i!.<\/p>\n

\"116_1.jpg\"<\/p>\n

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

B\u1ea1n v\u1ebd c\u00e1c m\u0169i t\u00ean l\u1ea7n l\u01b0\u1ee3t theo th\u1ee9 t\u1ef1 a, b, c,… C\u0169ng th\u1ea5y ngay k\u1ebft qu\u1ea3: h\u00ecnh c l\u1ea1c lo\u00e0i.<\/p>\n

\"116_2.jpg\"<\/p>\n

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

G\u1ea5p \u0111\u00f4i h\u00ecnh 1, ta \u0111\u01b0\u1ee3c h\u00ecnh 2, g\u1ea5p ti\u1ebfp h\u00ecnh 2, ta \u0111\u01b0\u1ee3c h\u00ecnh 3. V\u1eady h\u00ecnh m\u00e0 ta ch\u1ecdn l\u00e0 h\u00ecnh c.<\/p>\n

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

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

S\u1ed1 con m\u00e8o c\u00f3 trong ng\u00f4i nh\u00e0 l\u00e0:<\/p>\n

7 x 7 = 49 (nh\u00e0)<\/p>\n

S\u1ed1 con chu\u1ed9t b\u1ecb m\u00e8o \u0103n l\u00e0:<\/p>\n

49 x 7 = 343 (con)<\/p>\n

S\u1ed1 b\u00f4ng \u0111\u1ea1i m\u1ea1ch b\u1ecb chu\u1ed9t \u0103n l\u00e0:<\/p>\n

343 x 7 = 2401 (b\u00f4ng )<\/p>\n

S\u1ed1 h\u1ea1t m\u1ea1ch b\u1ecb \u0103n l\u00e0:<\/p>\n

2401 x 7 = 16807 (b\u00f4ng)<\/p>\n

\u0110\u00e1p s\u1ed1:<\/p>\n

7 nh\u00e0, 49 con m\u00e8o, 343 con chu\u1ed9t, 2401 b\u00f4ng, 16807 h\u1ea1t.<\/p>\n

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

\u0110\u00e1p s\u1ed1: b\u1eb1ng nhau.<\/p>\n

<\/a>C\u00c2U 6:<\/h3>\n

S\u1ed1 k\u1eb9o c\u1ee7a T\u00e8o
\nS\u1ed1 k\u1eb9o c\u1ee7a T\u00ed<\/p>\n

\"117.jpg\"<\/p>\n

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

T\u1ed5ng s\u1ed1 ph\u1ea7n b\u1eb1ng nhau l\u00e0:<\/p>\n

1 + 2 = 3 (ph\u1ea7n)<\/p>\n

S\u1ed1 k\u1eb9o t\u00e8o nh\u1eadn \u0111\u01b0\u1ee3c l\u00e0:<\/p>\n

24 : 3 = 8 (vi\u00ean)<\/p>\n

S\u1ed1 k\u1eb9o t\u00ed nh\u1eadn \u0111\u01b0\u1ee3c l\u00e0:<\/p>\n

8 x 2 = 16 (vi\u00ean)<\/p>\n

\u0110\u00e1p s\u1ed1: T\u00e8o: 8 vi\u00ean k\u1eb9o<\/p>\n

T\u00ed: 16 vi\u00ean k\u1eb9o.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U 1: C\u00e1i n\u00e0o l\u1ea1c lo\u00e0i ? C\u00c2U 2: C\u00e1i n\u00e0o l\u1ea1c lo\u00e0i? C\u00c2U 3: H\u00ecnh n\u00e0o nh\u1ea3y v\u00e0o d\u1ea5u (?) C\u00c2U 4: C\u00f3 7 nh\u00e0, m\u1ed7i nh\u00e0 c\u00f3 7 con m\u00e8o, m\u1ed7i con m\u00e8o \u0103n 7 con chu\u1ed9t, m\u1ed7i con chu\u1ed9t \u0103n 7 b\u00f4ng \u0111\u1ea1i m\u1ea1ch, m\u1ed7i b\u00f4ng c\u00f3 7 h\u1ea1t. T\u00ecm t\u1ed5ng s\u1ed1 […]<\/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-25486","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\/25486","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=25486"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25486\/revisions"}],"predecessor-version":[{"id":25493,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25486\/revisions\/25493"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25486"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25486"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25486"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}