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

Toán Lớp 6: Cho biểu thức: (- 9) . 72 + 9 . (- 29) – (- 9) 14 – (– 36) + (– 26)

Toán Lớp 6: Cho biểu thức:
(- 9) . 72 + 9 . (- 29) – (- 9)
14 – (– 36) + (– 26)

Comments ( 2 )

  1. (- 9) . 72 + 9 . (- 29) – (- 9)
    = – 648 + 9 . (- 29) – (- 9)
    = – 648 + (- 261) – (- 9)
    = (- 909) – (- 9)
    = -900 
    _____________________________
    14 – (- 36) + (- 26)
    = 50 + (- 26)
    = 24 
    __________________________
    @Rơm 

  2. a)
    (-9) × 72 + 9 × (-29) – (-9)
    = (-9) × 72 + (-9) × (-29) – (-9) × 1
    = -9 × ( 72 + 29 – 1 )
    = -9 × 100
    = -900
    b)
    14 – (-36) + (-26)
    = 14 + 36 – 26
    = 14 + 10
    = 24
    $☆Jυ丶¢нαи☆$

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