一對拖鞋原價39元,現在進行減價後,買一對拖鞋便宜9.5元,買二對共便宜20元,買3對共便宜33元(買3送1)
1a:袁太太付50元買拖鞋一對,應找回幾多元?
1b:袁太太買拖鞋4對,平均每對售多少元?(1b請列式)
小6maths~!幫下手啦
2007-10-30 2:40 am
回答 (7)
2007-10-30 2:56 am
✔ 最佳答案
1a. 20.51b. 39*3-33/4
=117-33/4
=84/4
=21元
2007-10-29 18:58:18 補充：
1a. 係30.5 唔係20.5
參考: 我和同學
2007-10-30 2:55 am
1a.50-(39-9.5)
=50-29.5
=20.5
2b.(39*3-33)除4
=84除4
=21
=50-29.5
=20.5
2b.(39*3-33)除4
=84除4
=21
2007-10-30 2:49 am
1a.50-(39-9.5)
=50-29.5
=$11.5
1b.(39*3-33)/4
=(117-33)/4
=84/4
=$21
^^
2007-10-29 18:50:59 補充：
1a.=20.5sorr
=50-29.5
=$11.5
1b.(39*3-33)/4
=(117-33)/4
=84/4
=$21
^^
2007-10-29 18:50:59 補充：
1a.=20.5sorr
參考: me
2007-10-30 2:49 am
1a/
50-39+9.5
=11+9.5
=20.5
1b/
第1,2,3對的價錢=39x3-33=117-33=84
第4對的價錢=0元(因為~~買3送1)
每對平均售價=84 / 4 =21元
50-39+9.5
=11+9.5
=20.5
1b/
第1,2,3對的價錢=39x3-33=117-33=84
第4對的價錢=0元(因為~~買3送1)
每對平均售價=84 / 4 =21元
參考: 自己
2007-10-30 2:49 am
1a.
50-(39-9.5)
=30.5
1b.
(39*4-33)/4
=(156-33)/4
=123/4
=30.75
50-(39-9.5)
=30.5
1b.
(39*4-33)/4
=(156-33)/4
=123/4
=30.75
收錄日期: 2021-04-13 18:21:48
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071029000051KK02747