4.32×7.2-43.2×0.72简便算法

问题描述:

4.32×7.2-43.2×0.72简便算法

4.32*7.2-43.2*0.72
= 4.32*7.2-(4.32*10)*0.72
去括号
=4.32*7.2-4.32*10*0.72
=4.32*7.2-4.32*(10*0.72)
=4.32*7.2-4.32*7.2
提取公因式
=4.32*(7.2-7.2)
=4.32*0
=0