8.5+7.6一8.5+2.4怎样简算急?

问题描述:

8.5+7.6一8.5+2.4怎样简算急?

8.5+7.6-8.5+2.4=8.5-8.5+7.6+2.4=7.6+2.4=10(移位就行了)