Distinguishing ordinal and cardinal numbers
key notes :
Cardinal numbers tell how many.
Counting numbers like one (1), two (2), and three (3) are cardinal numbers.
Ordinal numbers tell position.
Position numbers like first (1st), second (2nd), and third (3rd) are ordinal numbers.
Learn with an example
➡️ Which of the following are cardinal numbers? (There may be more than one.)
- thirty-five
- fifty-five
- 78
- 93rd
- These are cardinal numbers:
- thirty-five
fifty-five
78 - This is not a cardinal number. This is an ordinal number:
- 93rd
➡️ Which of the following are cardinal numbers? (There may be more than one.)
- 74th
- 65th
- 14
- twenty-ninth
- This is a cardinal number:
- 14
- These are not cardinal numbers. These are ordinal numbers:
- 74th
65th
twenty-ninth
➡️ Which of the following are cardinal numbers? (There may be more than one.)
- 26
- thirty-two
- 63
- 45
- These are all cardinal numbers:
- 26
thirty-two
63
45
let’s practice!
