{"id":25481,"date":"2021-12-24T16:55:56","date_gmt":"2021-12-24T09:55:56","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25481"},"modified":"2021-12-24T16:55:57","modified_gmt":"2021-12-24T09:55:57","slug":"bai-so-8-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-8-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 8 – \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"

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

C\u00f3 25 s\u1ed1 t\u1eeb 1 \u0111\u1ebfn 25 v\u00e0 m\u1ed9t khung h\u00ecnh 5 x 5 \u00f4 vu\u00f4ng c\u00e1c b\u1ea1n \u0111i\u1ec1n v\u00e0o trong c\u00e1c \u00f4 \u0111\u00f3 sao cho t\u1ed5ng c\u00e1c h\u00e0ng ngang, d\u1ecdc hay ch\u00e9o \u0111\u1ec3 t\u1ed5ng s\u1ed1 c\u00e1c h\u00e0ng b\u1eb1ng 65. M\u1ed7i ch\u1eef s\u1ed1 ch\u1ec9 \u0111\u01b0\u1ee3c d\u00f9ng 1 l\u1ea7n.<\/p>\n

\"18.jpg\"<\/p>\n

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

H\u1ed3ng \u0111\u1ebfn t\u1eb7ng sinh nh\u1eadt h\u00e0, ngo\u00e0i m\u00f3n qu\u00e0 l\u00e0 con b\u00fap b\u00ea \u0111\u1eb9p \u01a1i l\u00e0 \u0111\u1eb9p, h\u1ed3ng c\u00f2n mang \u0111\u1ebfn m\u1ed9t h\u1ed9p \u0111\u1ef1ng bi. H\u1ed3ng \u0111\u1eb7t h\u1ed9p bi l\u00ean b\u00e0n v\u00e0 n\u00f3i r\u1eb1ng: \u201cTrong h\u1ed9p c\u00f3 9 vi\u00ean bi \u0111\u1ecf v\u00e0 8 vi\u00ean bi xanh. Kh\u00f4ng nh\u00ecn v\u00e0o h\u1ed9p h\u00e0 h\u00e3y b\u1ed1c ra 2 vi\u00ean bi. N\u1ebfu c\u1ea3 hai vi\u00ean \u0111\u00f3 c\u00f9ng m\u00e0u th\u00ec h\u00e0 \u0111\u01b0\u1ee3c l\u1ea5y h\u1ebft. N\u1ebfu hai vi\u00ean bi \u0111\u00f3 kh\u00e1c m\u00e0u th\u00ec h\u00e0 \u0111\u01b0\u1ee3c l\u1ea5y vi\u00ean bi xanh c\u00f2n b\u1ecf vi\u00ean bi \u0111\u1ecf v\u00e0o h\u1ed9p. Ti\u1ebfp t\u1ee5c v\u00e0 c\u1ee9 nh\u01b0 th\u1ebf\u2026\u201d. B\u1ed7ng h\u1ed3ng tuy\u00ean b\u1ed1 h\u00e0 \u0111\u1eebng b\u1ed1c bi v\u00ec trong h\u1ed9p c\u00f2n \u0111\u00fang 1 vi\u00ean bi.<\/p>\n

H\u1ed3ng \u0111\u1ed1 c\u00e1c b\u1ea1n trong bu\u1ed5i sinh nh\u1eadt, vi\u00ean bi c\u00f2n l\u1ea1i trong h\u1ed9p l\u00e0 m\u00e0u g\u00ec? B\u1ea1n c\u00f3 \u0111o\u00e1n \u0111\u01b0\u1ee3c kh\u00f4ng?<\/p>\n

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

Nh\u00e2n d\u1ecbp khai gi\u1ea3ng, b\u1ea1n Loan chu\u1ea9n b\u1ecb \u0111\u1ed3 d\u00f9ng h\u1ecdc t\u1eadp<\/a> tr\u01b0\u1edbc khi tung t\u0103ng c\u1eafp s\u00e1ch t\u1edbi tr\u01b0\u1eddng. C\u00e1c b\u1ea1n nh\u1ecf c\u00f9ng Loan l\u00e0m b\u00e0i to\u00e1n vui n\u00e0y nh\u00e9! Ai \u0111i\u1ec1n \u0111\u01b0\u1ee3c v\u00e0o \u00f4 tr\u1ed1ng l\u00e0 th\u00f4ng minh \u0111\u1ea5y! c\u00e1c b\u1ea1n nh\u1ecf h\u00e3y c\u00f9ng \u0111o\u00e1n xem b\u1ea1n Loan n\u0103m nay h\u1ecdc l\u1edbp m\u1ea5y n\u00e0o? \u00f4 tr\u1ed1ng c\u00f2n b\u1eadt m\u00ed cho ch\u00fang ta bi\u1ebft ng\u00e0y \u0111\u1ea7u ti\u00ean b\u1ea1n Loan \u0111i h\u1ecdc \u0111\u1ea5y!<\/p>\n

Ch\u1eef s\u1ed1 n\u00e0o?<\/p>\n

\"19_1.jpg\"<\/p>\n

C\u00e1i g\u00ec n\u1eefa?<\/p>\n

\"19_2.jpg\"<\/p>\n

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

Ng\u00e0y x\u1eeda, ng\u00e0y x\u01b0a c\u00f3 m\u1ed9t n\u00e0ng c\u00f4ng ch\u00faa \u0111ang \u0111i d\u1ea1o ch\u01a1i, b\u1ed7ng t\u1eeb \u0111\u00e2u c\u00f3 m\u1ed9t con \u0111\u1ea1i b\u00e0ng lao t\u1edbi, qu\u1eafp l\u1ea5y c\u00f4 c\u00f4ng ch\u00faa bay v\u00fat l\u00ean kh\u00f4ng trung. N\u00f3 nh\u1ed1t n\u00e0ng tr\u00ean t\u1ea7ng 6 c\u1ee7a m\u1ed9t to\u00e0 nh\u00e0 xa x\u00f4i. Em th\u1eed T\u00ednh xem, mu\u1ed1n c\u1ee9u \u0111\u01b0\u1ee3c n\u00e0ng ng\u01b0\u1eddi ta ph\u1ea3i \u0111i qua bao nhi\u00eau b\u1eadc thang. Bi\u1ebft r\u1eb1ng mu\u1ed1n l\u00ean t\u1ea7ng ba c\u1ee7a to\u00e0 nh\u00e0 n\u00e0y ph\u1ea3i \u0111i qua 52 b\u1eadc thang (S\u1ed1 b\u1eadc thang \u1edf m\u1ed7i t\u1ea7ng nh\u01b0 nhau)?<\/p>\n

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

H\u00e0 \u0111\u1ed1 c\u00e1c b\u1ea1n: \u201cm\u00ecnh \u0111\u01b0a cho c\u00e1c b\u1ea1n 10 h\u1ea1t l\u00faa, m\u00ecnh s\u1ebd nh\u1edd c\u00e1c b\u1ea1n tr\u1ed3ng gi\u00fap v\u00e0 ph\u1ea3i tr\u1ed3ng th\u00e0nh 5 h\u00e0ng m\u1ed7i h\u00e0ng 4 h\u1ea1t l\u00faa\u201d? c\u00e1c em c\u00f3 th\u1ec3 gi\u00fap c\u00e1c b\u1ea1n c\u1ee7a h\u00e0 n\u00eau c\u00e1ch tr\u1ed3ng l\u00faa \u0111\u01b0\u1ee3c kh\u00f4ng?<\/p>\n

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

<\/a>B\u00c0I S\u1ed0 8<\/h2>\n

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

B\u00e0i gi\u1ea3i:<\/p>\n\n\n\n\n\n\n\n
17<\/td>\n24<\/td>\n1<\/td>\n8<\/td>\n15<\/td>\n<\/tr>\n
23<\/td>\n5<\/td>\n7<\/td>\n14<\/td>\n16<\/td>\n<\/tr>\n
4<\/td>\n6<\/td>\n13<\/td>\n20<\/td>\n22<\/td>\n<\/tr>\n
10<\/td>\n12<\/td>\n19<\/td>\n21<\/td>\n3<\/td>\n<\/tr>\n
11<\/td>\n18<\/td>\n25<\/td>\n2<\/td>\n9<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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

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

Theo b\u00e0i ra, s\u1ed1 bi \u0111\u1ecf \u0111\u01b0\u1ee3c l\u1ea5y ra kh\u1ecfi h\u1ed9p bao gi\u1edd c\u0169ng l\u00e0 2 vi\u00ean d\u00f9 b\u1ed1c \u0111\u01b0\u1ee3c bi c\u00f9ng m\u00e0u hay kh\u00e1c m\u00e0u, c\u00f2n s\u1ed1 bi m\u00e0u xanh l\u1ea5y ra kh\u1ecfi h\u1ed9p c\u00f3 th\u1ec3 l\u00e0 1 ho\u1eb7c 2 vi\u00ean. Nh\u01b0 v\u1eady, s\u1ed1 bi \u0111\u1ecf s\u1ebd \u0111\u01b0\u1ee3c l\u1ea5y ra 4 l\u1ea7n, m\u1ed7i l\u1ea7n 2 vi\u00ean, c\u00f2n l\u1ea1i 1 vi\u00ean kh\u00f4ng bao gi\u1edd \u0111\u01b0\u1ee3c l\u1ea5y ra k\u1ec3 c\u1ea3 khi bi xanh \u0111\u00e3 \u0111\u01b0\u1ee3c l\u1ea5y ra h\u1ebft. N\u00ean khi h\u00e0 d\u1eebng b\u1ed1c bi v\u00ec trong h\u1ed9p ch\u1ec9 c\u00f2n l\u1ea1i 1 vi\u00ean th\u00ec vi\u00ean bi \u0111\u00f3 s\u1ebd l\u00e0 m\u00e0u \u0111\u1ecf.<\/p>\n

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

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

a. S\u1ed1 9 l\u00e0 th\u00e1ng 9<\/p>\n

S\u1ed1 2004 l\u00e0 n\u0103m 2004<\/p>\n

V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n l\u00e0 s\u1ed1 5. B\u1ea1n Loan b\u1eaft \u0111\u1ea7u \u0111i h\u1ecdc v\u00e0o ng\u00e0y, m\u1ed3ng 5 th\u00e1ng 9 n\u0103m 2004.<\/p>\n

N\u0103m nay l\u00e0 n\u0103m 2006 suy ra n\u0103m nay b\u1ea1n Loan h\u1ecdc l\u1edbp 3 r\u1ed3i!<\/p>\n

b. V\u1edf: m\u1ed9t ch\u1eef c\u00f3 2 con ch\u1eef<\/p>\n

B\u00fat: m\u1ed9t ch\u1eef c\u00f3 3 con ch\u1eef<\/p>\n

S\u00e1ch: m\u1ed9t ch\u1eef c\u00f3 4 con ch\u1eef<\/p>\n

V\u1eady d\u1ee5ng c\u1ee5 h\u1ecdc t\u1eadp<\/a> ti\u1ebfp theo b\u1ea1n ph\u1ea3i t\u00ecm l\u00e0 m\u1ed9t ch\u1eef c\u00f3 5 con ch\u1eef.<\/p>\n

B\u1ea1n c\u00f3 th\u1ec3 \u0111i\u1ec1n ch\u1eef ti\u1ebfp theo l\u00e0 ch\u1eef Th\u01b0\u1edbc.<\/p>\n

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

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

Mu\u1ed1n l\u00ean t\u1ea7ng 3 ph\u1ea3i \u0111i qua 2 c\u1ea7u thang.<\/p>\n

S\u1ed1 b\u1eadc thang c\u1ee7a m\u1ed7i c\u1ea7u thang l\u00e0:<\/p>\n

52 : 2 = 26 (b\u1eadc thang)<\/p>\n

Mu\u1ed1n l\u00ean t\u1ea7ng 6 ph\u1ea3i \u0111i qua 5 c\u1ea7u thang n\u00ean ph\u1ea3i \u0111i qua:<\/p>\n

26 x 5 = 130 (b\u1eadc thang)<\/p>\n

\u0110\u00e1p s\u1ed1: 130 (b\u1eadc thang).<\/p>\n

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

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

Tr\u1ed3ng theo h\u00ecnh ng\u00f4i sao.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U 1: C\u00f3 25 s\u1ed1 t\u1eeb 1 \u0111\u1ebfn 25 v\u00e0 m\u1ed9t khung h\u00ecnh 5 x 5 \u00f4 vu\u00f4ng c\u00e1c b\u1ea1n \u0111i\u1ec1n v\u00e0o trong c\u00e1c \u00f4 \u0111\u00f3 sao cho t\u1ed5ng c\u00e1c h\u00e0ng ngang, d\u1ecdc hay ch\u00e9o \u0111\u1ec3 t\u1ed5ng s\u1ed1 c\u00e1c h\u00e0ng b\u1eb1ng 65. M\u1ed7i ch\u1eef s\u1ed1 ch\u1ec9 \u0111\u01b0\u1ee3c d\u00f9ng 1 l\u1ea7n. C\u00c2U 2: H\u1ed3ng \u0111\u1ebfn t\u1eb7ng […]<\/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-25481","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\/25481","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=25481"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25481\/revisions"}],"predecessor-version":[{"id":25485,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25481\/revisions\/25485"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}