189*123-123+123*2怎样简便计算?

2025-04-10 23:11:21
推荐回答(1个)
回答1:

原式=189×123-123×1+123×2
=(189-1+2)×123
=190×123
=(200-10)×123
=24600-1230
=23370
谢谢!