3⼀9+1⼀4+1⼀5等于几分之几?

2025-03-20 09:04:24
推荐回答(1个)
回答1:

先通分,再相加
3/9+1/4+1/5
=1/3+1/4+1/5
=20/60+15/60+12/60
=47/60