用简便方法计算?1.25x3.2x2.5用简便方法计算?1.25x3.2x2.5

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用简便方法计算?1.25x3.2x2.5用简便方法计算?1.25x3.2x2.5用简便方法计算?1.25x3.2x2.5用简便方法计算?1.25x3.2x2.5用简便方法计算?1.25x3.2x2.5

用简便方法计算?1.25x3.2x2.5用简便方法计算?1.25x3.2x2.5
用简便方法计算?1.25x3.2x2.5
用简便方法计算?
1.25x3.2x2.5

用简便方法计算?1.25x3.2x2.5用简便方法计算?1.25x3.2x2.5
1.25x3.2x2.5
=(1.25×0.8)×(4×2.5)
=1×10
=10