12分之5-4分之3+1.9=等于几?

2025-04-04 19:42:48
推荐回答(1个)
回答1:

12分之5-4分之3+1.9
=5/12-9/12+19/10
=19/10-(9/12-5/12)
19/10-1/3
=57/30-10/30
=47/30