Question

12.4-3.8怎么验算？

Answer 1

望采纳谢谢

Answer 2

12.4-3.8=8.6验算：8.6+3.8=12.4

Answer 3

12.4－3.8＝8.6 用8.6+3.8＝12.4就行

Answer 4

将得数和减数加起来。