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
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![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](/uploads/image/z/754766-62-6.jpg?t=%E5%A5%A5%E6%95%B0%28%E5%88%86%E6%95%B0%29%E8%AE%A1%E7%AE%97%E4%B8%AD%E7%9A%84%E6%8A%80%E5%B7%A71+1+1+1+1----+%2B--------%2B--------------%2B-----------------------%2B-----%2B----------------------------------------2+2%2B4+2%2B4%2B6+2%2B4%2B6%2B8+2%2B4%2B6%2B8%2B---------%2B100)
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
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
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
2分之1等于1减去2分之1, 2加4分之1等于6分之1等于2分之1减去3分之一, 依次类推,
到 1
----------------------------------------用等差数列求和算出等于50×51,所以等于50分之1减去51分之1
2+4+6+8+---------+100
所以,依次约分,答案是51分之50