1000-110-90-70-50-30-10的简便计算

1000-110-90-70-50-30-10的简便计算
2025-02-11 15:49:38
推荐回答(2个)
回答1:

原式
=1000-(110+90)-(70+30)-(50+10)
=1000-200-100-60
=1000-(200+100+60)
=1000-360
=640

或者
=1000-(90+10)-(70+30)-(110+50)
=1000-100-100-160
=800-160
=640

供参考。

回答2:

1000-(90+110)-(70+30)-50-10
=1000-200-100-50-10
=800-100-50-10
=700-50-10
=640