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画几个关键步骤吧,假设31,32一样大

Posted by gf_lu at 2008-05-25 01:57:48 on Problem 3601
In Reply To:Re:这题官方解答给出的公式不对吧?应该和具体数学习题1-12是一样的 Posted by:liulibo133 at 2008-05-25 01:13:06
1
2
31
32
__ __ __



31    1 
32    2
__ __ __



   32 1 
   31 2
__ __ __


1  32  
2  31 
__ __ __


1     31 
2     32
__ __ __

      1
      2
      31 
      32
__ __ __

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