{"id":25512,"date":"2021-12-24T17:07:20","date_gmt":"2021-12-24T10:07:20","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25512"},"modified":"2021-12-24T17:07:21","modified_gmt":"2021-12-24T10:07:21","slug":"bai-so-15-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-15-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 15 – \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"

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

H\u00e3y lo\u1ea1i m\u1ed9t h\u00ecnh h\u1ed9p kh\u00f4ng thu\u1ed9c “\u0111\u1ed3ng \u0111\u1ed9i”:<\/p>\n

\"30.jpg\"<\/p>\n

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

B\u1ea1n Loan mu\u1ed1n c\u1eaft m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt chi\u1ec1u r\u1ed9ng 2cm, chi\u1ec1u d\u00e0i 10cm ra nhi\u1ec1u m\u1ea3nh \u0111\u1ec3 gh\u00e9p l\u1ea1i th\u00e0nh h\u00ecnh vu\u00f4ng. C\u00e1c b\u1ea1n c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n Loan c\u1eaft, gh\u00e9p h\u00ecnh vu\u00f4ng sao cho \u00edt t\u1ed1n c\u00f4ng s\u1ee9c nh\u1ea5t kh\u00f4ng?<\/p>\n

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

(\u0110\u1ed1 m\u1eb9o):<\/p>\n

C\u00f3 3 con b\u00f2 \u0111i ch\u1ec9 th\u1ea5y c\u00f3 6 d\u1ea5u ch\u00e2n. H\u1ecfi t\u1ea1i sao nh\u01b0 v\u1eady?.<\/p>\n

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

T\u00ecm hai s\u1ed1 t\u1ef1 nhi\u00ean c\u00f3 t\u1ed5ng l\u00e0 1.111.110; bi\u1ebft s\u1ed1 l\u1edbn c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m v\u00e0 h\u00e0ng ngh\u00ecn to\u00e0n l\u00e0 8; s\u1ed1 b\u00e9 c\u00f3 ch\u1eef s\u1ed1 h\u00e0ng tr\u0103m v\u00e0 h\u00e0ng ngh\u00ecn l\u00e0 2. N\u1ebfu thay s\u1ed1 8 v\u00e0 s\u1ed1 2 \u1edf s\u1ed1 l\u1edbn v\u00e0 s\u1ed1 b\u00e9 l\u00e0 0, th\u00ec ta \u0111\u01b0\u1ee3c hai s\u1ed1 m\u1edbi, trong \u0111\u00f3 c\u00f3 m\u1ed9t s\u1ed1 g\u1ea5p 9 l\u1ea7n s\u1ed1 kia. T\u00ecm hai s\u1ed1 ban \u0111\u1ea7u.<\/p>\n

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

\u0110\u00e0n c\u00f2 bay l\u1ea3 bay la<\/p>\n

Bay qua c\u1eeda s\u1ed5 l\u1edbp ba ch\u00fang m\u00ecnh<\/p>\n

S\u1ed1 c\u00f2 c\u1ed9ng s\u1ed1 h\u1ecdc sinh<\/a><\/p>\n

B\u1eb1ng t\u00e1m m\u01b0\u01a1i m\u1ed1t \u0111\u1ed1 m\u00ecnh, \u0111\u1ed1 ta<\/p>\n

S\u1ed1 c\u00f2, s\u1ed1 h\u1ecdc sinh<\/a> l\u00e0<\/p>\n

2 s\u1ed1 li\u00ean ti\u1ebfp \u0111\u00e2y m\u00e0 b\u1ea1n \u01a1i!<\/p>\n

\u0110\u1ed1 vui v\u1eeba h\u1ecdc v\u1eeba ch\u01a1i<\/p>\n

S\u1ed1 c\u00f2 l\u00e0 m\u1ea5y, tr\u1ea3 l\u1eddi nhanh nhanh?<\/p>\n

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

<\/a>B\u00c0I S\u1ed0 15<\/h2>\n

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

H\u00ecnh B l\u00e0 h\u00ecnh l\u1ea1c lo\u00e0i.<\/p>\n

V\u00ec c\u00e1c h\u00ecnh kia \u0111\u1ec1u l\u00e0 nh\u1eefng h\u1ed9p k\u00edn, c\u00f2n h\u00ecnh b c\u00f3 7 m\u1eb7t b\u1ecb m\u1ea5t n\u1eafp n\u00ean n\u00f3 b\u1ecb lo\u1ea1i.<\/p>\n

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

C\u00f3 nhi\u1ec1u c\u00e1ch c\u1eaft gh\u00e9p kh\u00e1c nhau nh\u01b0ng l\u1eddi gi\u1ea3i t\u1ed1t nh\u1ea5t l\u00e0 c\u1eaft th\u00e0nh c\u00e0ng \u00edt m\u1ea3nh c\u00e0ng t\u1ed1t. B\u1ea1n c\u00f3 th\u1ec3 c\u1eaft th\u00e0nh 4 m\u1ea3nh v\u00e0 gh\u00e9p l\u1ea1i th\u00e0nh h\u00ecnh vu\u00f4ng nh\u01b0 sau:<\/p>\n

C\u00f3 th\u1ec3 c\u1eaft th\u00e0nh 5 m\u1ea3nh v\u00e0 gh\u00e9p l\u1ea1i nh\u01b0 sau:<\/p>\n

\"128.jpg\"<\/p>\n

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

\u0110\u00e1p s\u1ed1: \u0111\u00f3 l\u00e0 3 em b\u00e9 \u0111ang b\u00f2, ch\u00fang ta s\u1ebd th\u1ea5y 6 d\u1ea5u ch\u00e2n c\u00f2n l\u1ea1i l\u00e0 6 d\u1ea5u tay n\u00ean kh\u00f4ng t\u00ednh.<\/p>\n

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

\u0110\u00e1p s\u1ed1: 998899 v\u00e0 112211<\/p>\n

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

S\u1ed1 c\u00f2:
\nS\u1ed1 h\u1ecdc sinh<\/a>:<\/p>\n

\"129.jpg\"<\/p>\n

B\u00e0i gi\u1ea3i: Hai s\u1ed1 li\u00ean ti\u1ebfp h\u01a1n k\u00e9m nhau 1 \u0111\u01a1n v\u1ecb.<\/p>\n

Hai l\u1ea7n s\u1ed1 c\u00f2 l\u00e0:<\/p>\n

80 \u2013 1 = 81<\/p>\n

S\u1ed1 c\u00f2 l\u00e0:<\/p>\n

80 : 2 = 40 (con)<\/p>\n

\u0110\u00e1p s\u1ed1: 40 con c\u00f2.<\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00c2U 1: H\u00e3y lo\u1ea1i m\u1ed9t h\u00ecnh h\u1ed9p kh\u00f4ng thu\u1ed9c “\u0111\u1ed3ng \u0111\u1ed9i”: C\u00c2U 2: B\u1ea1n Loan mu\u1ed1n c\u1eaft m\u1ed9t h\u00ecnh ch\u1eef nh\u1eadt chi\u1ec1u r\u1ed9ng 2cm, chi\u1ec1u d\u00e0i 10cm ra nhi\u1ec1u m\u1ea3nh \u0111\u1ec3 gh\u00e9p l\u1ea1i th\u00e0nh h\u00ecnh vu\u00f4ng. C\u00e1c b\u1ea1n c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n Loan c\u1eaft, gh\u00e9p h\u00ecnh vu\u00f4ng sao cho \u00edt t\u1ed1n c\u00f4ng s\u1ee9c nh\u1ea5t kh\u00f4ng? […]<\/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-25512","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\/25512","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=25512"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25512\/revisions"}],"predecessor-version":[{"id":25516,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25512\/revisions\/25516"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25512"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25512"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25512"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}