论文部分内容阅读
仔细地观察一下1、2、3、4、5、6、7这7个数,如果不改变顺序,也不能重复,想一想用几个加号把这些数连起来,可使它们的和等于100?
Carefully observe the 1,2,3,4,5,6,7 these seven numbers, if we do not change the order can not be repeated, think about using a few plus these numbers together, make their sum Equal to 100?