164除以5分之4减0.75乘39减0.75这道题怎么简算

问题描述:

164除以5分之4减0.75乘39减0.75这道题怎么简算

164÷4/5-0.75×39-0.75 =164×5/4-0.75×(39+1) =205-3/4×40 =205-30 =175

原式=164*5/4-0.75*39-0.75=205-3/4*(39-1)=205-28.5=176.5