0.25x1.25x3.2
=0.25x4x8x1.25
=1x10
=10
把3.2分成0.8和4，先用0.25乘4，再算剩下的。聪明的你会的
解：0.25×1.25×3.2＝﹙0.25×4﹚×﹙1.25×0.8﹚＝1×1＝1.
0.25×1.25×3.2
=0.25×1.25×4×0.8
=[0.25×4]×[1.25×0.8]
=1×1
=1
0.25x1.25x3.2
=0.25x4x1.25x0.8
=1x1
=1
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