a, 150.19+84.67+71-84+84.12 b, 4.51.7+2.86.7+12.2.7 c, 36-28+64.69+36.82+41.62

By Cora

a, 150.19+84.67+71-84+84.12
b, 4.51.7+2.86.7+12.2.7
c, 36-28+64.69+36.82+41.62

0 bình luận về “a, 150.19+84.67+71-84+84.12 b, 4.51.7+2.86.7+12.2.7 c, 36-28+64.69+36.82+41.62”

  1. a, 150 . 19 + 84 . 67 + 71 . 84 + 84 . 12

    =  150 . 19 + 84 . (67 + 71 + 12)

    =  150 . 19 + 84 . 150

    =      150 . (19 + 84)

    =      150 . 105

    =            1575

    b, 4 . 51 . 7 + 2 . 86 . 7 + 12 . 2 . 7

    =  7 . ( 4 . 51 + 2 . 86 + 12 . 2 )

    =  7 . (   204  +  172   +   24    )

    =  7 .        400

    =        2800

    c, 36 . 28 + 64 . 69 + 36 . 82 + 41 . 62

    =   36 . (28 + 82) + 64 . 69 + 41 . 62

    =   36 .    110       + 64 . 69 + 41 . 62

    =      3960            +   4416  +    2542

    =                      10918

    Chúc học tốt!!!

     

    Trả lời
  2. $a) 150.19 + 84.67 + 71.84 + 12.84$

    $= 150.19 + 84.(67 + 71 + 12)$

    $= 150.19 + 84.150$

    $=150.(19 + 84)$

    $=150.105$

    $= 1575$

    $b) 4.51.7 + 2.86.7 + 12.2.7$

    $=7.(4.51 + 2.86 + 12.2)$

    $=7.(204 + 172 + 24)$

    $=7.400$

    $=2800$

    $c) 36.28 + 64.69 + 36.82 + 41.64$

    $=36.(28 + 82) + 64.(69 + 41)$

    $=36.110 + 64.110$

    $=110.(36 + 64)$

    $=110.100$

    $=11000$

    Trả lời

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