645-180-245的简便计算?

2024-12-31 23:05:22
推荐回答(2个)
回答1:

简便计算过程方法如下
解:645-180-245
=645-245-180
=400-180
=220

回答2:

645-180-245
=645-245-180
=400-180
=220