没脾气2x: 怎么想不到答案呢 [阅读: 428] 2011-09-22 03:52:21 2 2 7 7 9 = 27 2 3 6 7 7 = 25 3 3 4 7 7 = 24 1 6 6 7 7 = 27 没有相差为四的啊