a , -87 – ( -125 + 56 ) + ( 87 – 125 ) + 60 b , 128 + ( -981 – 28 ) – ( 65 – 918 ) – 35 c , -79 x 81 – 79 x 19 d , -63 x 78 +

a , -87 – ( -125 + 56 ) + ( 87 – 125 ) + 60
b , 128 + ( -981 – 28 ) – ( 65 – 918 ) – 35
c , -79 x 81 – 79 x 19
d , -63 x 78 + 63 x ( -22 )

2 bình luận về “a , -87 – ( -125 + 56 ) + ( 87 – 125 ) + 60 b , 128 + ( -981 – 28 ) – ( 65 – 918 ) – 35 c , -79 x 81 – 79 x 19 d , -63 x 78 +”

  1. #wdr
    a)
    -87-(-125+56)+(87-125)+60
    = -87+125-56+87-125+60
    = 4
    b)
    128+(-981-28)-(65-918)-35
    =128-981-28-65+918-35
    =-63
    c)
    -79 xx81-79xx19
    =-79xx(81+19)
    =-79xx100
    =-7900
    d)
    -63xx78+63xx(-22)
    =-63(78+22)
    =-63xx100
    =-6300
     

    Trả lời
  2. Giải đáp:
     a , -87 – ( -125 + 56 ) + ( 87 – 125 ) + 60
    =-87 -(-69) + (-38) + 60
    =-87 + 69 – 38 + 60
    =-18 – 38 + 60
    =-56 + 60 = 4
    b , 128 + ( -981 – 28 ) – ( 65 – 918 ) – 35

    =128 + ( -1009) – ( 65 – 918 ) – 35

    =128 + ( -1009) – (-853) – 35

    =-881 +853-35

    = -28-35

    =-63

    c , -79 x 81 – 79 x 19
    =-79 x 81 +(- 79 )x 19
    =(-79) × (81+19)
    =-79 × 100
    =-7900
     d , -63 x 78 + 63 x ( -22 )
    =-63 x 78 + -63 x 22
    =(-63)×(78+22)
    =(-63)×100
    =-6300
     

    Trả lời

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