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

Toán Lớp 6: tính nhanh:(-17).(1-382) -382.17

Toán Lớp 6: tính nhanh:(-17).(1-382) -382.17

Comments ( 2 )

  1. (-17). (1-382) – 382 . 17
    = ( – 17 ) . ( 1 – 382) – 382 . 17
    = (-17) . ( 1 – 382 + 382)
    =(-17) . ( 1 – 0)
    = ( -17 ). 1
    = -17
    @thew
     

  2. (-17).(1-382)-382.17
    =(-17).(1-382)+382.(-17)
    =(-17).(1-382+382)
    =(-17).(1-0)
    =(-17).1
    =(-17)

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