201.2/(201.2+201.2/4)*12.5怎样简便计算
问题描述:
201.2/(201.2+201.2/4)*12.5怎样简便计算
答
201.2/(201.2+201.2/4)*12.5
=1/(1+1/4)*12.5
=1/1.25*12.5
=10
答
201.2/(201.2+201.2/4)*12.5
=201.2×12.5/﹛201.2﹙1+1/4﹚﹜
=12.5/﹙5/4﹚
=12.5/1.25
=10