2.5x1.25x3.2用简便方法计算？

Question

如题所述

Answer 1

2.5x1.25x3.2用简便方法计算？
2.5x1.25x3.2
=(2.5x0.4)×(1.25x8)
=1×10
=10

Answer 2

原式
=1.25x0.25x(4x0.8)
=(1.25x0.8)x(0.25x4)
=1x1
=1
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