1.4b/12a
2.- 6x/8xy
3.(16a^2)/12a
4.(5r+15s)/5
5.(3a-a^2)/2a
更新1:
2. -6x/8xy
化簡以後各分數式,,20點(:
回答 (4)
2010-12-31 1:32 am
✔ 最佳答案
1.4b/12a= 4/12 * b/a
= 1/3 * b/a
= b/3a
2.- 6x/8xy
= -6/8 * x/x * 1/y
= -3/4 * 1 * 1/y
= -3/4y
3.(16a^2)/12a
= 16/12 * a^2 / a
= 4/3 * a
= 4a/3
4.(5r+15s)/5
= 5r/5 + 15s/5
= r + 3s
5.(3a-a^2)/2a
= 3a/2a - a^2/2a
= 3/2 - a/2
= (3-a)/2
參考: Hope the solution can help you^^”
2010-12-31 1:39 am
1. 4b/12a
= b/3a
2. -6x/8xy
= -3/4y
3. (16a^2)/12a
= 4a/3
4. (5r+15s)/5
= 5(r+3s)/5
= r+3s
5. (3a-a^2)/2a
= a(3-a)/2a
= 3-a/2
假如見到+/- 號便不能隨便約, 像4, 5題一樣, 要先抽common factor.
希望幫到你!
= b/3a
2. -6x/8xy
= -3/4y
3. (16a^2)/12a
= 4a/3
4. (5r+15s)/5
= 5(r+3s)/5
= r+3s
5. (3a-a^2)/2a
= a(3-a)/2a
= 3-a/2
假如見到+/- 號便不能隨便約, 像4, 5題一樣, 要先抽common factor.
希望幫到你!
2010-12-31 1:37 am
2010-12-31 1:37 am
1.4b/12a
= 4/12 * b/a
= 1/3 * b/a
= b/3a
2.- 6x/8xy
= -6/8 * x/x * 1/y
= -3/4 * 1 * 1/y
= -3/4y
3.(16a^2)/12a
= 16/12 * a^2 / a
= 4/3 * a
= 4a/3
4.(5r+15s)/5
= 5r/5 + 15s/5
= r + 3s
5.(3a-a^2)/2a
= 3a/2a - a^2/2a
= 3/2 - a/2
= (3-a)/2
= 4/12 * b/a
= 1/3 * b/a
= b/3a
2.- 6x/8xy
= -6/8 * x/x * 1/y
= -3/4 * 1 * 1/y
= -3/4y
3.(16a^2)/12a
= 16/12 * a^2 / a
= 4/3 * a
= 4a/3
4.(5r+15s)/5
= 5r/5 + 15s/5
= r + 3s
5.(3a-a^2)/2a
= 3a/2a - a^2/2a
= 3/2 - a/2
= (3-a)/2
收錄日期: 2021-04-25 13:03:31
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101230000051KK01092