用简便方法计算四年级"577-299"

2025-03-10 14:32:55
推荐回答(5个)
回答1:

577-299
=577一(300-1)
=577-300+1
=277+1
=278

回答2:

577-300+1=277+1=278
求采纳

回答3:

577-299=577-(300-1)=577-300+1=277+1=278求采纳

回答4:

577-299
=577-(300-1)
=577-300+1
=277+1
=278

回答5:

577-299
=577-(299+(1))
=577-300
=277+1
=288