18.6×0.75-0.75×8.6用简便方法计算

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18.6×0.75-0.75×8.6用简便方法计算
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18.6×0.75-0.75×8.6用简便方法计算
18.6×0.75-0.75×8.6用简便方法计算

18.6×0.75-0.75×8.6用简便方法计算
18.6×0.75-0.75×8.6
=0.75×(18.6-8.6)
=0.75×10
=7.5
这个把0.75提出来就很简单了.祝学习进步!