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

Toán Lớp 6: Tính nhanh : – 69 + 53 + 46 + (- 94) + (- 14) + 78

Toán Lớp 6: Tính nhanh :
– 69 + 53 + 46 + (- 94) + (- 14) + 78

Comments ( 2 )

  1. – 69 + 53 + 46 + (- 94) + (- 14) + 78
    = [(-69) + 53 + 46] + [(- 94) + (-14) + 78]
    = 30 + (-30)
    = 0
    #BTS

  2. -69+53+46+(-94)+(-14)+78
    =(-69+53)+(-94+(-14))+78+46
    =(-16)+(-108)+78+46
    =(-16+46)+(-108+78)
    =30+(-30)
    =0

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

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