分數問題~
1.)4/7+1又5/14
=?????
2.)12–7/9-2/3
=?????
3.)5+5/6×2又1/4
=?????
4.)4/5×15-11又3/7
=?????
5.)2-4又1/4÷2又1/8
=?????
回答 (1)
✔ 最佳答案
要計算呢d分數問題,通常都係要先通分母的:
1. 4/7 + 1 5/14
= 8/14 + (14+5)/14
= 27/14
= 1 13/14
2. 12 - 7/9 - 2/3
= 108/9 - 7/9 - 6/9
= 95/9
= 10 5/9
3. 5 + 5/6 x 2 1/4
= 5 + (5/6) x (9/4)
= 5 + 15/8
= 40/8 + 15/8
= 55/8
= 6 7/8
4. 4/5 x 15 - 11 3/7
= 12 - 11 3/7
= 84/7 - 80/7
= 4/7
5. 2 - 4 1/4 ÷ 2 1/8
= 2 - (17/4) ÷ (17/8)
= 2 - (17/4) x (8/17)
= 2 - 2
= 0
收錄日期: 2021-04-18 20:29:09
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20061218000051KK02246
檢視 Wayback Machine 備份