10.79-3.2*2.8如何简便计算,
问题描述:
10.79-3.2*2.8如何简便计算,
答
10.79-3.2*2.8
=10.79-(3+0.2)*(3-0.2)
=10.79-9+0.04
=1.79+0.04
=1.83