P6 數學 - 折扣
回答 (3)
2009-02-07 4:14 am
✔ 最佳答案
現買得5盒共可節省:=84x5 - 84x75%x4
=84x5 - 84x0.75x4
=420 - 63x4
=420 - 252
=168
2009-02-08 3:52 am
75%=1-25%
than buy 3 get one free
so 25%*4=1
84*5=420
so,現買得5盒共可節省84+84=168元
than buy 3 get one free
so 25%*4=1
84*5=420
so,現買得5盒共可節省84+84=168元
2009-02-07 3:52 am
原來要buy 5合= 84x5 =420
而家只係要buy 4合,而佢送一合
每合要= 84x0.75 =63
4合要 63x 4 =252
可節省= 420-252=168
而家只係要buy 4合,而佢送一合
每合要= 84x0.75 =63
4合要 63x 4 =252
可節省= 420-252=168
收錄日期: 2021-04-13 16:25:02
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20090206000051KK01528