{"id":25629,"date":"2021-12-24T17:33:42","date_gmt":"2021-12-24T10:33:42","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25629"},"modified":"2021-12-24T17:33:42","modified_gmt":"2021-12-24T10:33:42","slug":"bai-so-36-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-36-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 36 – \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"

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

H\u00ecnh n\u00e0o s\u1ebd kh\u00f4ng kh\u1edbp v\u1edbi m\u1ea3ng c\u00f2n thi\u1ebfu:<\/p>\n

\"74.jpg\"<\/p>\n

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

\u1ede hy L\u1ea1p c\u00f3 m\u1ed9t nh\u00e0 to\u00e1n h\u1ecdc r\u1ea5t n\u1ed5i ti\u1ebfng, nh\u01b0ng kh\u00f4ng ai bi\u1ebft ch\u00ednh x\u00e1c tu\u1ed5i \u00f4ng, s\u1ed5 s\u00e1ch c\u0169ng kh\u00f4ng th\u1ea5y nh\u1eafc \u0111\u1ebfn. Nh\u01b0ng tr\u00ean bia m\u1ed9 c\u1ee7a \u00f4ng c\u00f3 ghi 6 th\u00f4ng tin nh\u01b0 sau:<\/p>\n

    \n
  1. 1\/6 cu\u1ed9c \u0111\u1eddi \u00f4ng \u0111\u01b0\u1ee3c h\u01b0\u1edfng ni\u1ec1m h\u1ea1nh ph\u00fac c\u1ee7a tu\u1ed5i ni\u00ean thi\u1ebfu.<\/li>\n
  2. L\u1ea1i s\u1ed1ng th\u00eam 1\/12 cu\u1ed9c \u0111\u1eddi n\u1eefa th\u00ec r\u00e2u m\u1ecdc l\u01b0a th\u01b0a.<\/li>\n
  3. \u00d4ng \u0111\u00e3 c\u00f3 v\u1ee3 nh\u01b0ng ch\u01b0a c\u00f3 con v\u00e0 s\u1ed1ng nh\u01b0 v\u1eady th\u00eam 1\/7 cu\u1ed9c \u0111\u1eddi n\u1eefa.<\/li>\n
  4. N\u0103m n\u0103m sau \u00f4ng c\u00f3 \u0111\u1ee9a con trai \u0111\u1ea7u l\u00f2ng v\u00e0 r\u1ea5t h\u1ea1nh ph\u00fac.<\/li>\n
  5. Th\u1eadt b\u1ea5t h\u1ea1nh, cu\u1ed9c \u0111\u1eddi t\u01b0\u01a1i \u0111\u1eb9p c\u1ee7a ng\u01b0\u1eddi con trai ch\u1ec9 d\u00e0i b\u1eb1ng n\u1eeda cu\u1ed9c \u0111\u1eddi \u00f4ng.<\/li>\n
  6. Khi \u0111\u1ee9a con trai qua \u0111\u1eddi, \u00f4ng r\u1ea5t \u0111au bu\u1ed3n n\u00ean ch\u1ec9 s\u1ed1ng th\u00eam 4 n\u0103m n\u1eefa r\u1ed3i c\u0169ng qua \u0111\u1eddi. H\u1ecfi nh\u00e0 to\u00e1n h\u1ecdc n\u00e0y bao nhi\u00eau tu\u1ed5i?<\/li>\n<\/ol>\n

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

    M\u1ed9t c\u1ea7u thang c\u00f3 13 b\u1eadc, trong \u0111\u00f3 c\u00f3 1 b\u1eadc b\u1ecb h\u1ecfng. Ng\u01b0\u1eddi th\u1ee9 nh\u1ea5t b\u01b0\u1edbc l\u00ean b\u1eadc th\u1ee9 nh\u1ea5t r\u1ed3i c\u1ee9 th\u1ebf nh\u1ea3y 2 b\u1eadc m\u1ed9t cho \u0111\u1ebfn \u0111\u1ec9nh c\u1ea7u thang. Ng\u01b0\u1eddi th\u1ee9 hai c\u1ee9 b\u01b0\u1edbc l\u00ean 3 b\u1eadc thang th\u00ec lui v\u1ec1 1 b\u1eadc, r\u1ed3i l\u1ea1i ti\u1ebfp ba b\u1eadc, lui 1 b\u1eadc cho \u0111\u1ebfn khi l\u00ean t\u1edbi \u0111\u1ec9nh. V\u1eady theo b\u1ea1n b\u1eadc thang th\u1ee9 bao nhi\u00eau b\u1ecb h\u1ecfng?<\/p>\n

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

    Quay ngang quay d\u1ecdc,<\/p>\n

    L\u1eadt t\u1edbi l\u1eadt lui,<\/p>\n

    L\u1ed9n \u0111\u1ea7u l\u1ed9n \u0111u\u00f4i,<\/p>\n

    T\u00f4i v\u1eabn l\u00e0 t\u00f4i,<\/p>\n

    Kh\u00f4ng h\u1ec1 thay \u0111\u1ed5i. L\u00e0 g\u00ec?<\/p>\n

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

    Tr\u01b0\u1eddng ta s\u0129 s\u1ed1 1000.<\/p>\n

    Kh\u1ed1i m\u1ed9t s\u0129 s\u1ed1 \u0111\u1ee9ng h\u00e0ng nh\u1ea5t nha<\/p>\n

    Chi\u1ebfm 1 ph\u1ea7n 4 tr\u01b0\u1eddng ta<\/p>\n

    Kh\u1ed1i n\u0103m, kh\u1ed1i b\u1ed1n, kh\u1ed1i ba c\u00e2n b\u1eb1ng<\/p>\n

    Kh\u1ed1i hai s\u0129 s\u1ed1 bi\u1ebft r\u1eb1ng<\/p>\n

    180 nh\u1edb ch\u0103ng b\u1ea1n hi\u1ec1n<\/p>\n

    \u0110\u1ed1 nhi \u0111\u1ed3ng, \u0111\u1ed1 thi\u1ebfu ni\u00ean<\/p>\n

    Kh\u1ed1i ba s\u0129 s\u1ed1 \u0111\u00e1p li\u1ec1n bao nhi\u00eau?<\/p>\n

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

    Cho m\u1ea3nh gi\u1ea5y nh\u01b0 h\u00ecnh v\u1ebd d\u01b0\u1edbi \u0111\u00e2y:<\/p>\n

    \"77.jpg\"<\/p>\n

    H\u00e3y c\u1eaft m\u1ea3nh gi\u1ea5y th\u00e0nh 4 m\u1ea3nh nh\u1ecf b\u1eb1ng nhau.<\/p>\n

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

    <\/a>B\u00c0I S\u1ed0 36<\/h2>\n

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

    \"173.jpg\"<\/p>\n

    \u0110\u00e1p s\u1ed1: \u0111\u00f3 l\u00e0 h\u00ecnh D.<\/p>\n

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

    \u0110\u00e1p s\u1ed1: 84 tu\u1ed5i.<\/p>\n

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

    B\u1eadc thang th\u1ee9 12 b\u1ecb h\u1ecfng.<\/p>\n

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

    L\u00e0 ch\u1eef s\u1ed1 0.<\/p>\n

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

    S\u0129 s\u1ed1 kh\u1ed1i 1 l\u00e0:<\/p>\n

    1000 : 4 = 250 (b\u1ea1n)<\/p>\n

    S\u0129 s\u1ed1 kh\u1ed1i hai, kh\u1ed1i ba, kh\u1ed1i b\u1ed1n v\u00e0 kh\u1ed1i n\u0103m l\u00e0:<\/p>\n

    1000 \u2013 250 = 750 (b\u1ea1n)<\/p>\n

    S\u0129 s\u1ed1 kh\u1ed1i ba, kh\u1ed1i b\u1ed1n v\u00e0 kh\u1ed1i n\u0103m l\u00e0:<\/p>\n

    750 \u2013 180 = 570 (b\u1ea1n)<\/p>\n

    S\u0129 s\u1ed1 kh\u1ed1i ba l\u00e0:<\/p>\n

    570 : 3 = 190 (b\u1ea1n)<\/p>\n

    \u0110\u00e1p s\u1ed1: 190 b\u1ea1n<\/p>\n

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

    B\u00e0i n\u00e0y m\u1edbi nh\u00ecn h\u00ecnh t\u01b0\u1edfng l\u00e0 kh\u00f3 nh\u01b0ng suy ngh\u0129 m\u1ed9t ch\u00fat th\u00f4i c\u00e1c b\u1ea1n s\u1ebd th\u1ea5y c\u00f3 nhi\u1ec1u c\u00e1ch chia kh\u00e1c nhau. Sau \u0111\u00e2y xin gi\u1edbi thi\u1ec7u m\u1ed9t v\u00e0i c\u00e1ch chia:<\/p>\n

    \"175.jpg\"<\/p>\n","protected":false},"excerpt":{"rendered":"

    C\u00c2U 1: H\u00ecnh n\u00e0o s\u1ebd kh\u00f4ng kh\u1edbp v\u1edbi m\u1ea3ng c\u00f2n thi\u1ebfu: C\u00c2U 2: \u1ede hy L\u1ea1p c\u00f3 m\u1ed9t nh\u00e0 to\u00e1n h\u1ecdc r\u1ea5t n\u1ed5i ti\u1ebfng, nh\u01b0ng kh\u00f4ng ai bi\u1ebft ch\u00ednh x\u00e1c tu\u1ed5i \u00f4ng, s\u1ed5 s\u00e1ch c\u0169ng kh\u00f4ng th\u1ea5y nh\u1eafc \u0111\u1ebfn. Nh\u01b0ng tr\u00ean bia m\u1ed9 c\u1ee7a \u00f4ng c\u00f3 ghi 6 th\u00f4ng tin nh\u01b0 sau: 1\/6 cu\u1ed9c \u0111\u1eddi […]<\/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-25629","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\/25629","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=25629"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25629\/revisions"}],"predecessor-version":[{"id":25634,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25629\/revisions\/25634"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}