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Re:不对呀。27就应该是7吧

Posted by fqchenwei at 2007-08-13 11:26:01 on Problem 1945
In Reply To:不对呀。27就应该是7吧 Posted by:xuezaiyue at 2004-10-27 20:39:40 
1 + 1 -> 2
2 + 2 -> 4
4 + 4 -> 8
8 + 1 -> 9
9 + 9 -> 18
9 + 18 -> 27

6步正解

> 请问大哥怎么做出的6步？
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