脱式计算 50+28-30+22

2025-04-24 05:09:29
推荐回答(3个)
回答1:

脱式计算

回答2:

50+28-30+22
=78-30+22=48+22=70

回答3:

50+28-30+22
=50+(28+22)-30
=50+50-30
=100-30
=70