Question

4.32×7.2-43.2×0.72简便算法

Answer 1

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