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[(42/3-2.75)×(1/20+0.25)]÷1/8用简便方法怎么做
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[(42/3-2.75)×(1/20+0.25)]÷1/8用简便方法怎么做
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答案和解析
[(42/3-2.75)×(1/20+0.25)]÷1/8用简便方法
解,得：
==[(14-2.75)*0.3]*8
==11.25*0.3*8
==11.25*2.4
==(11+0.25)*2.4
==11*2.4+0.25*2.4
==26.4+0.6
==27
解,得：
==[(14-2.75)*0.3]*8
==11.25*0.3*8
==11.25*2.4
==(11+0.25)*2.4
==11*2.4+0.25*2.4
==26.4+0.6
==27
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