1除以0.25乘(1.28除以3.2)怎样用简便方 - 知识问答

1除以0.25乘(1.28除以3.2)怎样用简便方法计算

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1除以0.25乘(1.28除以3.2)
=1/0.25*(1.28/3.2)
=4*1.28/3.2
=1.28/0.8
=(1+0.28)/0.8
=1.25+0.35
=1.6

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