四分之三减七分之二除以十四分九减九分之二咋做?

2024-12-14 17:50:10
推荐回答(1个)
回答1:

3/4-2/7÷9/14-2/9
=3/4-2/7×14/9-2/9
=3/4-4/9-2/9
=3/4-(4/9+2/9)
=3/4-2/3
=1/12