756-127-17的简便方法?

2025-04-15 01:57:51
推荐回答(2个)
回答1:

简便计算过程方法如下
756-127-17
=756-(127-17)
=756-110
=646

回答2:

756-127-17
=756-(127+17)
=756-110
=646