Key learning points

1. Ordinal numbers indicate a single item or event rather than a quantity.
2. Review how ordinal numbers are named and represented and show the shortened written names.
3. Ordinal numbers contain part or all of the corresponding number words. First and second are exceptions.
4. The difference between cardinal and ordinal numbers is the difference between quantity and position.

Keywords

• Ordinal number - A number that tells the position of something in relation to something else.

• Cardinal number - A number that shows how many of something there are.

• First to fifth - Ordinal numbers that describe the position of something.

Common misconception