(/=分數) (:=比,例如:3:4=3比4)
1.6x:7=2:14
2.2/3:4/9=3:1/9
3.x/2:4=2:12
thankyou!!!!!!!!!!!!!!!!!!!!!1
收錄日期: 2021-04-13 15:39:39
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080601000051KK00752