In order to form a number from hereon, take one of the tens from the list, add an -o "و" after the ten, and then add the number afterwards (e.g: twenty-one is bist-o yek (بیستو یک)).
To form a hundred and thousands for that matter, simply add the number in question (1-9) before the hundred or thousand (only exception being 200, see below.) Again, to separate numbers properly simply add a add an -o "و", like we see in the last example.
avval (اول) "first"
dovvom (دوم) "second"
sevvom (سوم) "third"
chahārom (چهارم) "fourth"
panjom (پنجم) "fifth"
Beyond these numbers, simply add -om (م) to the end of the number to form the ordinal.
jam' (جمع) "addition"
menhā (ممنها) "subtraction"
zarb (ضرب) "multiplication"
taghsim (تقسیم) "division"
nesf (نصف) "half"
rob' (ربع) "quarter"