3.2*37+47*3.7+21*3.7该怎么简便?

问题描述:

3.2*37+47*3.7+21*3.7该怎么简便?

3.2*37+47*3.7+21*3.7
=37*3.2+37*4.7+37*2.1
=37*(3.2+4.7+2.1)
=37*10
= 370