这里符合题意的小数有无数个,如:1.1,48.99,48.999等,1~49中的合数有:4,6,8,9,10,12,14,15,16,18,20,21,22,24,25,26,27,28,30,32,33,34,35,36,38,39,40,42,44,45,46,48共计32个。另:1既不是合数,也不是质数。