Listen and repeat. How do we form ordinal numbers?

1st = first — первый

2nd = second — второй

3rd = third — третий

4th = fourth — четвертый

5th = fifth — пятый

6th = sixth — шестой

7th =seventh — седьмой

8th = eighth — восьмой

9th = ninth — девятый

10th = tenth — десятый

11th = eleventh — одиннадцатый

12th = twelfth — двенадцатый

13th = thirteenth — тринадцатый

14th = fourteenth — четырнадцатый

15th = fifteenth — пятнадцатый

16th = sixteenth — шестнадцатый

17th = seventeenth — семнадцатый

18th = eighteenth — восемнадцатый

19th = nineteenth — девятнадцатый

20th = twentieth — двадцатый