数学题

家有小源 (2009-06-05 07:18:20) 评论 (0)

                 .
      ,               ;                ,       .


             ,  耀.,      ,      ,      .


  , 1  200,         , (1+200)*100=20100; 


  , 59*59? 60 * 60 – 60 - 59 = 60 * 59 - 59 = 59*59


 ,        ;  便      .