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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 6: tính hợp lý : A= 5/7 . -3/38 . 7/10 . 19/6

Toán Lớp 6: tính hợp lý : A= 5/7 . -3/38 . 7/10 . 19/6

Comments ( 2 )

  1. A = 5/7 * (-3)/38 * 7/10 * 19/6
       = (5/7 * 7/10) * ((-3)/38 * 19/6)
       = 5/10 * 1/2 * (-1)/2
       = 1/2 * (-1)/4
       = (-1)/8
     

  2. Answer
    A = 5/7 . {-3}/38 . 7/10 . 19/6
    A = 5/7 . 7/10 . {-3}/38 . 19/6
    A = 1/2 . {-1}/4
    A = {-1}/8
    Vậy A = {-1}/8

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222-9+11+12:2*14+14 = ? ( )

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