4.96-0.4*7.5+5.13简便算法
问题描述:
4.96-0.4*7.5+5.13简便算法
答
4.96-0.4*7.5+5.13
=4.96-0.4*2.5*3+5.13
=4.96-3+5.13
=1.96+5.13
=7.09