第二題:
(a/2-a/5)*5=24
方程式唔識做!
2007-03-23 12:41 am
回答 (7)
2007-03-23 12:47 am
✔ 最佳答案
(a/2-a/5)*5=24(5a/10-2a/10)*5=24
(3a/10)*5=24
15a/10=24
15a=240
a=240/15
a=16
2007-03-23 3:34 am
(a/2-a/5)*5=24
a/2-a/5=24/5
5a/10-2a/10=4 4/5
3a/10=4 5/4
3a=4 5/4*10
a=48/3
a=16
a/2-a/5=24/5
5a/10-2a/10=4 4/5
3a/10=4 5/4
3a=4 5/4*10
a=48/3
a=16
參考: me
2007-03-23 1:08 am
(a/2-a/5)*5=24
5a/2-5a/5=24
25a/10-10a/10=240/10
25a-10a=240
15a=240
a=16
5a/2-5a/5=24
25a/10-10a/10=240/10
25a-10a=240
15a=240
a=16
參考: 我自己
2007-03-23 12:52 am
(a/2-a/5)*5 = 24
=> a/2 - a/5 = 24/5
=> 5a/10 - 2a/10 = 24/5
=> 3a/10 = 24/5
=> (3/10) a = (24/5)
=> a = (24/5) / (3/10) = (24/5) * (10/3) = 8 / 2 = 4
明白就好la~~!
=> a/2 - a/5 = 24/5
=> 5a/10 - 2a/10 = 24/5
=> 3a/10 = 24/5
=> (3/10) a = (24/5)
=> a = (24/5) / (3/10) = (24/5) * (10/3) = 8 / 2 = 4
明白就好la~~!
2007-03-23 12:48 am
5[5(a/2)-2(a/5)]=24
5(5a/10-2a/10)=24
5(3a/10)=24
3a/2=24
3a=48
a=16
5(5a/10-2a/10)=24
5(3a/10)=24
3a/2=24
3a=48
a=16
參考: 自己
收錄日期: 2021-04-12 21:32:31
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070322000051KK02078