4.86+2.4+5.14+6.6简便算法、脱式计算.怎样做?

问题描述:

4.86+2.4+5.14+6.6简便算法、脱式计算.怎样做?

简单算法:
(4.86+5.14)+(2.4+6.6)
=10+9
=19
脱式计算:
4.86+2.4+5.14+6.6
=7.26+5.14+6.6
=12.4+6.6
=19