Which of the following fractions has a decimal equivalent that is a terminating decimal?
A. 10/189
B. 15/196
C. 16/225
D. 25/144
E. 39/128
答案E是怎麼算出的啊?
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这个帖子里有这题的解释
http://forum.chasedream.com/dispbbs.asp?boardID=22&ID=59789&page=1
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