賣出2本書共1.8元，賺率12.5%賺得多少?
過程
thx~
P.6數學(賺賠)急
2007-11-01 12:58 am
回答 (5)
2007-11-01 1:44 am
$1.8 / (1+12.5%) x 12.5%
= $1.8 / 1.125 x 12.5%
= $1.6 x 12.5%
= $0.2
每本書賺$0.1
賺得$0.2元!
= $1.8 / 1.125 x 12.5%
= $1.6 x 12.5%
= $0.2
每本書賺$0.1
賺得$0.2元!
2007-11-01 1:15 am
先計本金 是多少
切x是本金
[x*(1+12.5%)]*2 = 1.8
x*112.5%=1.8/2
x*(1125/1000)=0.9
x=0.9*(1000/1125)
x=0.8
2本書的本金是 0.8*2 = 1.6
賣出兩本書共賺 1.8-1.6= 0.2
賺得0.2元!
切x是本金
[x*(1+12.5%)]*2 = 1.8
x*112.5%=1.8/2
x*(1125/1000)=0.9
x=0.9*(1000/1125)
x=0.8
2本書的本金是 0.8*2 = 1.6
賣出兩本書共賺 1.8-1.6= 0.2
賺得0.2元!
2007-11-01 1:12 am
$1.8 / (1+12.5%) x 12.5%
= $1.8 / 1.125 x 12.5%
= $1.6 x 12.5%
= $0.2
共賺$0.2
每本書賺$0.1
= $1.8 / 1.125 x 12.5%
= $1.6 x 12.5%
= $0.2
共賺$0.2
每本書賺$0.1
2007-11-01 1:07 am
1.8/2=0.9=1本書
0.9/(1+12.5%)
=0.9 x 8/9
=0.1
=賺0.1元
2007-10-31 17:08:20 補充：
2本書賺$0.2
0.9/(1+12.5%)
=0.9 x 8/9
=0.1
=賺0.1元
2007-10-31 17:08:20 補充：
2本書賺$0.2
2007-11-01 1:04 am
1.8x 12.5%
=1.8 x 125/1000
=$0.225
唔係太肯定,,好耐無計lu~
=1.8 x 125/1000
=$0.225
唔係太肯定,,好耐無計lu~
收錄日期: 2021-04-29 18:32:24
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20071031000051KK02101