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

Toán Lớp 6: Tính nhanh -5+(-37-45+51)-(-37+51)

Toán Lớp 6: Tính nhanh
-5+(-37-45+51)-(-37+51)

Comments ( 2 )

  1. -5 + (-37 – 45 + 51) – (-37 + 51)
    = -5 – 37 – 45 + 51 + 37 – 51
    = -5 + (37 – 37) + (51 – 51) – 45
    = -5 + 0 + 0 – 45
    = -5 – 45
    = -50

  2. -5 + (-37 – 45 + 51 ) – (-37 + 51)
    = -5 – 37 – 45 + 51 + 37 – 51
    = (-5- 45) + ( 37 – 37) + ( 51 – 51)
    = -50 – 0 + 0
    = -50

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

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