1. 基数词缩写：1-15分别为：1st, 2nd, 3rd, 4th, 5th, 6th, 7th, 8th, 9th, 10th, 11th, 12th, 13th, 14th, 15th。
2. 序数词缩写：1-15分别为：1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15。
因为在正规文书写作中，序数词一般需要以数字形式出现，而不适用缩写。
1到15的基数词和序数词缩写如下：
基数词：
1. 1 - one
2. 2 - two
3. 3 - three
4. 4 - four
5. 5 - five
6. 6 - six
7. 7 - seven
8. 8 - eight
9. 9 - nine
10. 10 - ten
11. 11 - eleven
12. 12 - twelve
13. 13 - thirteen
14. 14 - fourteen
15. 15 - fifteen
序数词：
1. 1st - first
2. 2nd - second
3. 3rd - third
4. 4th - fourth
5. 5th - fifth
6. 6th - sixth
7. 7th - seventh
8. 8th - eighth
9. 9th - ninth
10. 10th - tenth
11. 11th - eleventh
12. 12th - twelfth
13. 13th - thirteenth
14. 14th - fourteenth
15. 15th - fifteenth
注意，只有1、2、3的序数词有特殊的缩写形式（即1st、2nd、3rd），其他数字的序数词都是直接在其基数词后面加上“-th”后缀。
