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

Toán Lớp 4: Giải bằng cách thuận tiện nhất 254×147-127×92-254

Toán Lớp 4: Giải bằng cách thuận tiện nhất 254×147-127×92-254

Comments ( 2 )

  1. 254xx147-127xx92-254
    =254xx147-127xx2xx46-254
    =254xx147-254xx46-254
    =254xx(147-46-1)
    =254xx100
    =25400

  2. 254 × 147 – 127 × 92 – 254
    = 254 × 147 – 127 × 2 × 46 – 254
    = 254 × 147 – 254 × 46 – 254
    = 254 × ( 147 – 46 – 1 )
    = 254 × 100
    = 25 400

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