1. James bought a book which costs $P. He got a change of $12 from $120 for that book. how much does a book cost ?
2. 1 5/6 x 1/3 -:- 4/9
3. 2/7 -:- ( 3/5 x 1/6 )
4. 1 1/4 x 12
Maths
2007-08-21 10:26 pm
回答 (2)
2007-08-21 10:33 pm
✔ 最佳答案
1. $p +$12 = $120$P=$120-$12
= $108
2. 1 5/6 x 1/3 -:- 4/9
=11/6 x 1/3 x 9/4
=11/8
=1 3/8
3. 2/7 -:- ( 3/5 x 1/6 )
= 2/7 -:- (1/10)
=2/7 x 10/1
=20/7
=2 6/7
4. 1 1/4 x 12
=5/4 x 12
=15
2007-08-22 5:29 am
1./P=$120-$12
P=$108
∴A book cost $108
2./1 5/6*1/3÷4/9
=11/6*1/3÷4/9
=11/18÷4/9
=11/18*9/4
=1 3/8
3./2/7÷(3/5*1/6)
=2/7÷1/10
=2/7*10
=2 6/7
4./1 1/4*12
=5/4*12
=15
P=$108
∴A book cost $108
2./1 5/6*1/3÷4/9
=11/6*1/3÷4/9
=11/18÷4/9
=11/18*9/4
=1 3/8
3./2/7÷(3/5*1/6)
=2/7÷1/10
=2/7*10
=2 6/7
4./1 1/4*12
=5/4*12
=15
參考: me
收錄日期: 2021-04-25 13:17:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070821000051KK03455