1.25*6又5分之1+3.8/5分之4
问题描述：
1.25*6又5分之1+3.8/5分之4
答
=(5/4)*(31/5)+3.8*(5/4)=31/4+19/4=50/4=25/2
答
原式=1.25*（6+1/5)+3.8*5/4
=1.25*(6+0.2)+3.8*1.25
=1.25*(6+0.2+3.8)
=1.25*10
=12.5