Question

7.2×8.12+0.72×8.8简便方法？

Answer 1

这道题可以使用乘法分配律来做，不过要把原题转化一下，即：
7.2x8.12+0.72x8.8
=7.2x8.12+7.2x0.88
=7.2x(8.12+0.88)
=7.2x9
=64.8

Answer 2

7.2×8.12+0.72×8.8简便算法：
7.2×8.12+0.72×8.8=7.2×8.12+7.2×0.88
=7.2×(8.12+088)
=7.2×9
=64.8

Answer 3

可以利用乘法分配律，将两边同时配平即可
7.2×8.12+0.72×8.8
=7.2×8.12+7.2×0.88
=7.2×(8.12+0.88)
=7.2×9
=64.8

Answer 4

7.2×8.12+0.72×8.8
=7.2×8.12+7.2×0.88
=7.2×（8.12+0.88）
=7.2×9
=64.8
此题应用了乘法分配的逆运算，计算简单。

Answer 5

把第二个乘法算式中改为0.72×0.88×10=7.2×0.88。
提取公因数7.2。
原式
=7.2×8.12+7.2×0.88
=7.2×（8.12+0.88）
=7.2×9
=64.8