0.75乘以55加7.5乘以4.5等于?
问题描述:
0.75乘以55加7.5乘以4.5等于?
答
75
0.75乘以55加7.5乘以4.5=0.75×55+0.75×45=0.75×(55+45)=0.75×100=75