3.3乘以四分之三+0.75乘以5又十分之七+0.75
问题描述：
3.3乘以四分之三+0.75乘以5又十分之七+0.75
thannk
答
=3.3*0.75+0.75*5.7+0.75
=0.75*（3.3+5.7+1）
=0.75*10
=7.5