[(42/3-2.75)×(1/20+0.25)]÷1/8用简便方法怎么做

题目

[(42/3-2.75)×(1/20+0.25)]÷1/8用简便方法怎么做

答案

[(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