15.7×0.2-5.7×0.2简便方法

15.7×0.2-5.7×0.2简便方法
2025-04-07 06:28:24
推荐回答(1个)
回答1:

15.7×0.2-5.7×0.2
=(15.7-5.7)*0.2
=10*0.2
=2