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

Toán Lớp 6: 1. Thực hiện các phép tính sau: a) (- 136) + 54 b) 15 – 87 c) 21 – (- 67) d) ( -65) + ( – 56)+ 12 e) ( -22) + 9 + 13 +

Toán Lớp 6: 1. Thực hiện các phép tính sau:
a) (- 136) + 54
b) 15 – 87
c) 21 – (- 67)
d) ( -65) + ( – 56)+ 12
e) ( -22) + 9 + 13 + ( – 28)
f) 517 – (- 313) + ( -120)

Comments ( 2 )

  1. a, $\text{(-136) + 54 = -82}$
    b, $\text{15 – 87 = -72}$
    c, $\text{21 – (- 67) = 88}$
    d, $\text{(-65) + (- 56)+ 12 = -109}$
    e, $\text{(-22) + 9 + 13 + (- 28) = -28}$
    f, $\text{517 – (- 313) + ( -120) = 710}$
    _____________________
    $\text{@Táo????}$
     

  2. a) (-136)+54
    = -(136-54)
    = -82
    b) 15-87
    = -72
    c) 21-(-67)
    = 21+67
    = 88
    d) (-65)+(-56)+12
    = (-121)+12
    = -109
    e) (-22)+9+13+(-28)
    = (-22)+22+(-28)
    = 0+(-28)
    = -28
    f) 517-(-313)+(-120)
    = 517+313+(-120)
    = 830+(-120)
    = 710
    @N

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

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