问题描述:
奥数(分数)计算中的技巧
1 1 1 1 1
---- +--------+--------------+-----------------------+-----+----------------------------------------
2 2+4 2+4+6 2+4+6+8 2+4+6+8+---------+100
1 1 1 1 1
---- +--------+--------------+-----------------------+-----+----------------------------------------
2 2+4 2+4+6 2+4+6+8 2+4+6+8+---------+100
问题解答:
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