1^st

(the)first

11^th

(the) eleventh

2^nd

(the) second

12^th

(the) twelfth

3^rd

(the) third 

13^th

(the) thirteenth

4^th

(the) fourth

14^th

(the) fourteenth

5^th

(the)fifth

15^th

(the) fifteenth

6^th

(the) sixth

16^th

(the) sixteenth

7^th

(the) seventh

20^th

(the) twentieth

8^th

(the) eighth

40^th

(the) fortieth

9^th

(the) ninth

50^th

(the) fiftieth

10^th

(the) tenth

70^th

(the) sixtieth

21^st

(the) twenty-first

80^th

(the) eightieth

22^nd

(the) twenty-second

90^th

(the) ninetieth

23^rd

(the) twenty-third

100^th

(the) hundredth

24^th

(the) twenty-fourth

1,000^th

(the) thousandth

25^th

(the) twenty-fifth

1,000,000^th

(the) millionth

26^th

(the) twenty-sixth

27^th

(the) twenty-seventh

28^th

(the) twenty-eighth

29^th

(the) twenty-ninth

30th

(the) thirtieth