Names for ordinal numbers

Here are some words for small ordinal numbers. Words in bold are irregular.
When writing other numbers between 21 and 99, only use the cardinal form of the last number. Also, you must use a hyphen (-).
The ordinal number 100 is written as "one hundredth", but sometimes people say "the hundredth".
To write a number from 100 to 999:
Examples:
You can also write ordinal numbers by writing the number, then the ending (-st, -nd, -rd, or -th) from above.