填22
86=17*5+(3-1)最后一个格子,如果底下是2,则答案是22;如果底下是4,则答案是一个小数
答案是223x5+2 = 17 17*5+1 = 862x5+2 = 12 12x5+1 = 614x5+2 = 22 22x5+1 = 111