2012年第三届世界数学团体锦标赛儿童组团体赛第1题是:已知1/5+1/4+1/3+1/2+1/1+1/a=116/607,求a的值.对于竞赛题来说,该题设计新颖,别具一格,运算量合适,难易适中,解题入口宽,是训练解题能力的一道好题.该题的表面上是解分式方程,实质上是考查繁分式的化简技能.因为是多重繁分式,稍不留心,就会出错,故值得我们探索其解法. The first question of the 2012 Third World Mathematical Group Championship children’s group competition is: Known 1/5 + 1/4 + 1/3 + 1/2 + 1/1 + 1 / a = 116/607, For the competition title, the title of the novel design, unique style, the amount of computation is appropriate, easy to moderate, wide problem-solving entry is a good problem-solving skills training problems.The surface of the problem is to solve the fractional equation, In essence, it is to examine the simplification skill of the multiplication, because it is multiplication, it is wrong to make a mistake, so it is worth to explore its solution.