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

Toán Lớp 6: a,(-15)-[35-(-42)+(-46)]+15 b,(-45)+(-65)-35+145+132

Toán Lớp 6: a,(-15)-[35-(-42)+(-46)]+15
b,(-45)+(-65)-35+145+132

Comments ( 2 )

  1. a. (-15) – [35 – (-42) + (-46)] + 15
    = (15 – 15) – [35 + 42 + (-46)]
    = 0 – [77 + (-46)]
    = 0 – 31
    = – 31
    __________________________________________-
    b. (-45) + (-65) – 35 + 145 + 132
    = (145 – 45) + (-65 – 35) + 132
    = 100 + (-100) + 132
    = 0 + 132
    = 132

  2. a,(-15)-[35-(-42)+(-46)]+15
    =(-15+15)-[77+(-46)]
    =0-31
    =-31
    b,(-45)+(-65)-35+145+132
    =(-45+145)+(-65-35)+132
    =100+(-100)+132
    =0+132
    =132

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