1. Thir + teen
thirteen
2. Four + teen
fourteen
3. Five + teen
fifteen
4. Six + teen
sixteen
5. Seven + teen
seventeen
6. Eight + teen
eighteen
7. Nine + teen
nineteen
8. Twen +ty
twenty
9. Thir + ty
thirty
10. Four + ty
forty
11. Five + ty
fifty
12. Six + ty
sixty
13. Seven + ty
seventy
14. Eight + ty
eighty
15. Nine + ty
Ninety
16. hundred
17. Forty + four
18. Twenty + one