1/2+3/5-5/9
回答 (3)
2006-10-18 12:06 am
✔ 最佳答案
= 49/90 
2006-10-18 12:10 am
如困你講的是份數的話就應該是:1/2+3/5-5/9 .....=5/10+6/10-5/9...=11/10-5/9...=1又9/90-50/90...=99/90-50/90...=49/90
參考: 自己
2006-10-18 12:05 am
1/2+3/5-5/9
= 45/90 + 54/90 -50/90 <- 先通分母
= 49/90
= 45/90 + 54/90 -50/90 <- 先通分母
= 49/90
收錄日期: 2021-04-23 15:47:54
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061017000051KK01920