在0～0.1之间有（9）个两位小数，分别是（0.01,0.02,0.03,0.04,0.05,0.06,0.07,0.08,0.09）16. 3在（16）和（17）这两个整数之间1515.18在（1515.17）和（1515.19）这两个一位小数之间望采纳，谢谢~~
