4. 7 又 4分之1-2又7分之4+1又2分之1=?
5. 4 又 5分之1-1又3分之1 -2又6分之5=?
6. 6-2又8分之1+1又3分之2=?
7. 2又9分之2+1又6分之1-1又3分之2=?
8. 5又5分之2-1又8分之1+2又10分之1=?
9. 3+9又12分之7-7又8分之7=?
10. 13又6分之5-8又10分之7+3又20分之17=?
暑期作業!請幫!
2007-08-13 7:46 pm
回答 (4)
2007-08-13 8:00 pm
✔ 最佳答案
分數計算機個網,有計分數既計數機. 自己計啦！http://download1.mers.hk/primary/maths/tool/cS4S24/index.htm
http://hk.knowledge.yahoo.com/question/?qid=7006102302945
2007-08-13 8:16 pm
4,7/1/4-2/4/7+1/1/2
=7/7/28-2/16/28+1/14/28
=6/35/28-2/16/28+1/14/28
=4/19/28+1/14/28
=5/33/28
=6/5/28
5.4/1/5-1/1/3-2/5/6
=4/6/30-1/10/30-2/25/30
=3/36/30-1/10/30-2/25/30
=2/26/30-2/25/30
=1/30
6.6-2/1/8+1/2/3
=5/8/8-2/1/8+1/2/3
=3/7/8+1/2/3
=3/21/24+1/16/24
=4/37/24
=5/13/24
其實你只要記著以下的規則,你計分數便能得心應手:
a-c/d/b
=e/b/b-c/d/b
b/c-a/d
=e/f-g/f (通分母)
a/b/c+d/e/f-g/h/i
=a/j/k+d/l/k-g/m/k(通分母)
=7/7/28-2/16/28+1/14/28
=6/35/28-2/16/28+1/14/28
=4/19/28+1/14/28
=5/33/28
=6/5/28
5.4/1/5-1/1/3-2/5/6
=4/6/30-1/10/30-2/25/30
=3/36/30-1/10/30-2/25/30
=2/26/30-2/25/30
=1/30
6.6-2/1/8+1/2/3
=5/8/8-2/1/8+1/2/3
=3/7/8+1/2/3
=3/21/24+1/16/24
=4/37/24
=5/13/24
其實你只要記著以下的規則,你計分數便能得心應手:
a-c/d/b
=e/b/b-c/d/b
b/c-a/d
=e/f-g/f (通分母)
a/b/c+d/e/f-g/h/i
=a/j/k+d/l/k-g/m/k(通分母)
參考: me
2007-08-13 8:08 pm
4.6又28分之5
5.30分之1
6.5又24分之13
7.1又18分之13
8.6又8分之3
9.4 又24分之17
10,8又60分之59
5.30分之1
6.5又24分之13
7.1又18分之13
8.6又8分之3
9.4 又24分之17
10,8又60分之59
收錄日期: 2021-04-13 16:34:33
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070813000051KK01707