8.23+6.5-8.23+6.5怎样简便计算?
问题描述：
8.23+6.5-8.23+6.5怎样简便计算?
答
8.23-8.23+6.5+6.5=13
答
8.23+6.5-8.23+6.5
=8.23-8.23+6.5+6.5
=0+6.5+6.5
=6.5*2
=13.