一些数学问题,如果抓住问题的特征,采用分步分析的方法,问题就会不难解决。【例题】用1、2、3、4、5、6、7、8这八个数字组成有若干个数的数组(数组中每个数字必须用一次且只能用一次),数组中的所有数之和为117,例如:12、83、4、5、6、7就是合乎要求的一组数。那么,这样的数组共有__段。(2013年小学数学竞赛决赛第14题) Some mathematical problems, if we grasp the characteristics of the problem and adopt the method of stepwise analysis, the problem will not be difficult to solve. [Example] with 1,2,3,4,5,6,7,8 these eight numbers composed of a certain number of arrays (each number in the array must be used once and only once), all of the array The sum of numbers is 117, for example: 12, 83, 4, 5, 6, 7 is the desired number of sets. Well, such an array of __ total. (Question 14 of the final primary school mathematics contest 2013)