4⼀7÷5⼀21-2⼀5等于多少?

2025-06-28 03:58:46
推荐回答(2个)
回答1:

回答2:

4/7÷5/21-2/5
=4/7x21/5-2/5
=12/5-2/5
=10/5
=2