薯片每包原價2.5元,現10元可買5包。買5包薯片的折扣是多少?
大毛巾每買半打多送2條,折扣是多少?
我要(色)
數學題10分急急急
2007-03-14 3:57 am
回答 (4)
2007-03-14 4:02 am
✔ 最佳答案
買5包薯片的折扣 :( 2.5 x 5 - 10 ) / 2.5 x 5
= 2 . 5 / 12.5
= 1 / 5
= 20%
( 8折 )
大毛巾折扣 :
(6 + 2 - 6 ) / 6
= 2 / 6
= 1 / 3
= 33 . 33 ...%
= 33 . 33%
(六七折)
2007-03-14 4:03 am
10 / 5 = 2
(2 / 2.5) x 100% = 80%(8折)
(2 / 2.5) x 100% = 80%(8折)
2007-03-14 4:01 am
買5包原價:2.5*5=12.5(元)
折扣率:10/12.5*100%=80%
買半打多送2條,即買8條付6條價錢,折扣率為:
6/8*100%
=75%
折扣率:10/12.5*100%=80%
買半打多送2條,即買8條付6條價錢,折扣率為:
6/8*100%
=75%
收錄日期: 2021-04-12 23:28:17
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070313000051KK03555