Приветствую Вас, Гость
1  - one   -  the first              11 - eleven      - the eleventh
 2  - two   -  the second       12 - twelve      - the twelfth
 3  - three - the third             13 - thirteen    - the thirteenth
 4  - four   - the fourth           14 - fourteen   - the fourteenth
 5 - five    -  the fifth              15 - fifteen       - the fifteenth
 6 - six      - the sixth             16 - sixteen     - the sixteenth
 7 - seven - the seventh        17 - seventeen - the seventeenth
 8 - eight   - the eighth           18 - eighteen    - the eighteenth
 9 - nine    - the ninth              19 - nineteen    - the nineteenth
10- ten      - the tenth              20 - twenty       - the twentieth

http://www.primarygames.com/squigly/congrats.htm


http://0.tqn.com/d/math/1/0/i/R/Ordinal-numbers-1.jpg

http://0.tqn.com/d/math/1/5/m/R/Ordinal-numbers-6.jpg
http://www.agendaweb.org/vocabulary/numbers-exercises.html