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- UID
- 223426
- 帖子
- 324
- 主题
- 4
- 注册时间
- 2011-7-11
- 最后登录
- 2014-8-7
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anirudhcfa,
I approach it mathematically. In 15, you have to arrive at $ cost. To get $ cost, pound and pound will cancel out only if you multiply. In 16, yo have to arrive Euro cost. To get Euro cost, TW$ and TW$ will cancel out only if you divide.
Edited 1 time(s). Last edit at Wednesday, March 30, 2011 at 09:34PM by vasanthcbe. |
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发表于 2011-7-11 19:23
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