[(42/3-2.75)×(1/20+0.25)]÷1/8用简便方法怎么做
问题描述:
[(42/3-2.75)×(1/20+0.25)]÷1/8用简便方法怎么做
答
[(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