215*35+215-15*250 简便计算

2024-11-30 05:59:27
推荐回答(2个)
回答1:

215X35+215-15X250
=215X35+215-15X215-15X35
=215X(35-15)+215-350-5X35
=215X20+215-350-175
=4300+40-350
=3990

回答2:

215*35+215-15*250
=15*15*36-15*250
=15*10*(48-25)
=150*23=3450