1.3 5
___+___=
5 6
2.11 8
___-___=
12 9
送分題! 快! :分數（關於數學）
2007-10-21 10:36 pm
回答 (1)
2007-10-22 5:13 pm
✔ 最佳答案
1)3/5 + 5/6
= 3*6/5*6 + 5*5/6/5
= 18/30 + 25/30
= (18+25)/30
= 43/30
= 1 又 13/30
2)
11/12 - 8/9
= 11*3/12*3 - 8*4/9*4
= 33/36 - 32/36
= 1/36
收錄日期: 2021-04-13 19:02:53
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071021000051KK02369