下面各题,怎样简便就怎样算.问3.28*5.7+6.72*5.7
问题描述：
下面各题,怎样简便就怎样算.问3.28*5.7+6.72*5.7
答
就结合律呗
答
乘法分配律的逆运用（3.28+6.27）*5.7
答
3.28*5.7+6.72*5.7
=5.7*(3.28+6.72)
=5.7*10
=57