Ordinal numbers are used to indicate the position of objects relative to others.
⇒⇒ Our school is the first in the city.
⇒⇒ My parents are celebrating their tenth anniversary.
⇒⇒ History books are on the second shelf from the top.
How to Write Ordinal Numbers
1st → First
2nd → Second
3rd → Third
The ones coming after the first three ordinal numbers are a little easier to learn and write. We add -th to the numbers following the first three ordinal numbers. But, there are some exceptions:
⇒⇒ Five → Fifth
⇒⇒ Twelve → Twelfth
⇒⇒ Eight → Eighth
∗ When we want to get ‘ninth’, we drop the -e at the end of the nine and add -th.
⇒⇒ Nine → Ninth
∗ In numbers ending with the letter -y, -y is dropped and -ieth is added to convert it to an ordinal number. We can see this in number 20 and subsequent tens.
⇒⇒ Twenty → Twentieth
⇒⇒ Thirty → Thirtieth
The digits between the tens are expressed as the cardinal number in the first part and the ordinal number in the second part.
⇒⇒ 21st → Twenty-first
⇒⇒ 32nd → Thirty-second