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?

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.