用简便方法计算25X32X12.565X39+65（1/2+1/4+1/6）X24

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答案和解析

25X32X12.5
=25X4X8X12.5
=100X100
=10000

65X39+65
=65X(39+1)
=65X40
=2600

（1/2+1/4+1/6）X24
=1/2X24+1/4X24+1/6X24
=12+6+4
=22

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