1到100的单数和双数各是50，也就是说1到10单数是5个，双数是5个，照这样下去那不就明明白白的了吗。11到20也同样是单数是5个，双数是5个，100个数字不就是各占一半吗。也就是说单数是50个，双数是50个。我们每个人在学习上一定要认真学习天天向上。
单数有，
1,3,5,7,9,11,13,15,1,,19,21,23,25,27,29,31,33,35,37,39,41,43,45,47,49,51,53,55,57,59,61,63,65,67,69,71,73,75,77,79,81,83,85,87,89,91,93,95,97,99. 共 50个
双数：2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62,64,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100 共50个
