问题标题：
|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+|1/6-1/5|+|1/7-1/6|+|1/8-1/7|1/9-1/8|+1/10-1/9等于多少
问题描述：
|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+|1/6-1/5|+|1/7-1/6|+|1/8-1/7|1/9-1/8|+1/10-1/9等于多少
范立娜回答：
|1/3-1/2|+|1/4-1/3|+|1/5-1/4|+|1/6-1/5|+|1/7-1/6|+|1/8-1/7|1/9-1/8|+1/10-1/9│=1/2-1/3+1/3-1/4+1/4-1/5+1/5-1/6+1/6-1/7+1/7-1/8+1/8-1/9+1/9-1/10=1/2-1/10=2/5
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