{"id":25535,"date":"2021-12-24T17:13:03","date_gmt":"2021-12-24T10:13:03","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=25535"},"modified":"2021-12-24T17:13:04","modified_gmt":"2021-12-24T10:13:04","slug":"bai-so-19-do-vui-luyen-tri-thong-minh","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/bai-so-19-do-vui-luyen-tri-thong-minh\/","title":{"rendered":"B\u00c0I S\u1ed0 19 – \u0110\u1ed1 vui luy\u1ec7n tr\u00ed th\u00f4ng minh"},"content":{"rendered":"

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

Em s\u1ebd ch\u1ecdn h\u00ecnh n\u00e0o?<\/p>\n

\"37.jpg\"<\/p>\n

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

M\u1ed9t \u0111\u1ed1ng th\u00f3c \u1edf gi\u1eefa s\u00e2n, t\u1ef1 ta x\u00fac \u0111i 40kg h\u1ecfi c\u00f2n l\u1ea1i bao nhi\u00eau kg?<\/p>\n

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

C\u00f3 1 ng\u01b0\u1eddi ng\u01b0 d\u00e2n \u0111ang b\u1eaft c\u00e1 tr\u00ean thuy\u1ec1n nh\u01b0ng anh ta l\u1ea1i mu\u1ed1n r\u1eeda tay m\u00e0 tay anh ta c\u00e1ch m\u1eb7t n\u01b0\u1edbc 5cm sau 5 ph\u00fat m\u1eb7t n\u01b0\u1edbc l\u1ea1i d\u00e2ng l\u00ean 1cm. H\u1ecfi sau bao l\u00e2u anh ta m\u1edbi r\u1eeda tay \u0111\u01b0\u1ee3c? (Kh\u00f4ng \u0111\u01b0\u1ee3c d\u00f9ng v\u1eadt d\u1ee5ng g\u00ec \u0111\u1ec3 h\u1ea1 thuy\u1ec1n xu\u1ed1ng)<\/p>\n

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

H\u00e3y \u0111i\u1ec1n s\u1ed1 ti\u1ebfp theo v\u00e0o d\u00e3y s\u1ed1 sau:<\/p>\n

1, 4, 9, 16……<\/p>\n

1, 2, 3, 5\u2026\u2026<\/p>\n

0, 6, 24, 60…….<\/p>\n

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

<\/a>B\u00c0I S\u1ed0 19<\/h2>\n

<\/a>C\u00c2U 1: CH\u1eccN H\u00ccNH D<\/h3>\n

\"136.jpg\"<\/p>\n

H\u00ecnh b\u00ean tr\u00e1i d\u1ecbch chuy\u1ec3n l\u00ean ph\u1ea7n tr\u00ean c\u1ee7a hai h\u00ecnh b\u00ean c\u1ea1nh. Hai h\u00ecnh b\u00ean c\u1ea1nh v\u1eabn n\u1eb1m d\u01b0\u1edbi nh\u01b0ng xoay theo chi\u1ec1u kim \u0111\u1ed3ng h\u1ed3.<\/p>\n

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

\u0110\u00e2y l\u00e0 m\u1ed9t b\u00e0i to\u00e1n m\u1eb9o<\/p>\n

T\u1ef1 ta n\u00f3i l\u00e1i th\u00e0nh t\u1ea1 t\u01b0. Sau khi x\u00fac 40kg c\u00f2n l\u1ea1i 140 – 40 = 100kg.<\/p>\n

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

Ch\u1eb3ng khi n\u00e0o ng\u01b0\u1eddi ng\u01b0 d\u00e2n r\u1eeda tay \u0111\u01b0\u1ee3c c\u1ea3 v\u00ec n\u01b0\u1edbc d\u00e2ng l\u00ean thuy\u1ec1n c\u0169ng d\u00e2ng l\u00ean.<\/p>\n

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

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

    \n
  • V\u00ec 1, 4, 9, 16,… 25<\/li>\n<\/ul>\n

    1 = 1 x 1<\/p>\n

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

    9 = 3 x 3<\/p>\n

    16 = 4 x 4<\/p>\n

    V\u1eady s\u1ed1 ti\u1ebfp theo l\u00e0 25<\/p>\n

    V\u00ec 25 = 5 x 5<\/p>\n

      \n
    • 1, 2, 3, 5,… 7<\/li>\n<\/ul>\n

      7 l\u00e0 s\u1ed1 nguy\u00ean t\u1ed1 ti\u1ebfp theo<\/p>\n

        \n
      • 0, 6, 24, 60,\u2026 120<\/li>\n<\/ul>\n

        V\u00ec: 0 = 0 x 1 x 2<\/p>\n

        6 = 1 x 2 x 3<\/p>\n

        24 = 2 x 3 x 4<\/p>\n

        60 = 3 x 4 x 5<\/p>\n

        120 = 4 x 5 x 6.<\/p>\n","protected":false},"excerpt":{"rendered":"

        C\u00c2U 1: Em s\u1ebd ch\u1ecdn h\u00ecnh n\u00e0o? C\u00c2U 2: M\u1ed9t \u0111\u1ed1ng th\u00f3c \u1edf gi\u1eefa s\u00e2n, t\u1ef1 ta x\u00fac \u0111i 40kg h\u1ecfi c\u00f2n l\u1ea1i bao nhi\u00eau kg? C\u00c2U 3: C\u00f3 1 ng\u01b0\u1eddi ng\u01b0 d\u00e2n \u0111ang b\u1eaft c\u00e1 tr\u00ean thuy\u1ec1n nh\u01b0ng anh ta l\u1ea1i mu\u1ed1n r\u1eeda tay m\u00e0 tay anh ta c\u00e1ch m\u1eb7t n\u01b0\u1edbc 5cm sau 5 […]<\/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-25535","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\/25535","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=25535"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25535\/revisions"}],"predecessor-version":[{"id":25538,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/25535\/revisions\/25538"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=25535"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=25535"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=25535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}