2015x198-2014x197怎么众简便计算?

2025-05-21 08:18:07
推荐回答(1个)
回答1:

简便计算
2015x198-2014x197
=198+2014x198-2014x197
=198+2014x(198-197)
=198+2014
=2014+200-2
=2214-2
=2212