355-260+245-140用简便方法怎么做

2024-11-24 09:21:46
推荐回答(2个)
回答1:

355-260+245-140
=(355+245)-(260+140)
=600-400
=200

回答2:

355-260-140+245
=(355+245)-(260+140)
=600-400
=200