3.9+0.1-3.9+0.1怎么简便计算?
问题描述:
3.9+0.1-3.9+0.1怎么简便计算?
答
3.9-3.9+0.1+0.1
=0+0.1+0.1=0.2
3.9+0.1-3.9+0.1怎么简便计算?
3.9-3.9+0.1+0.1
=0+0.1+0.1=0.2