1.25*3.6简便算法1.25*3.6简便算法啊！
问题描述：
1.25*3.6简便算法
1.25*3.6简便算法啊！
答
1.25*(4-0.4)=1.25*4-1.25*0.4=5-0.5=4.5
答
1.25*3.6
=(1+0.25)*3.6
=(1+1/4)*3.6
=3.6+0.9
=4.5
答
1.25*3.6
=1.25*4*0.9
=5*0.9
=4.5