1.25*021*3.2用简便方法怎么算
问题描述:
1.25*021*3.2用简便方法怎么算
答
1.25*0.21*3.2
=1.25*0.21*0.8*4
=1.25*0.8*4*0.21
=1*4*0.21
=4*0.21
=0.84