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

Toán Lớp 5: 8,12 x 7 + 8,12 x5 – 8,12 x 2 .tinh bằng cách thuận tiện

Toán Lớp 5: 8,12 x 7 + 8,12 x5 – 8,12 x 2 .tinh bằng cách thuận tiện

Comments ( 2 )

  1.   8,12 × 7 + 8,12 × 5 – 8,12 × 2
    = 8,12 × ( 7 + 5 – 2 )
    = 8,12 × 10
    = 81,2
     

  2. 8,12×7+8,12×5-8,12×2
    =8,12×(7+5-2)
    =8,12×(12-2)
    =8,12×10
    =81,2

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

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