Cardinal, Ordinal and Nominal Numbers
Cardinal: how many
Ordinal: position
Nominal: name
Cardinal Numbers
A Cardinal Number is a number that says how many of something there are, such as one, two, three, four, five.
A Cardinal Number answers the question "How Many?"
Example: here are five coins:
It does not have fractions or decimals, as it is only used for counting.
Ordinal Numbers
An Ordinal Number is a number that tells the position of something in a list. 1st, 2nd, 3rd, 4th, 5th etc.
Example: In "apple, banana, carrot" the word "banana" is 2nd
Nominal Numbers
A Nominal Number is a number used only as a name, or to identify something (not as an actual value or position)
Examples:
- the number on the back of a footballer ("10")
- a postal code ("91210")
- a model number ("380")
Example With Everything
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In this photo there are 6 cars. Car Number "99" (with the yellow roof) is currently in 1st position:
- 6 is a Cardinal Number (it tells how many)
- 1st is an Ordinal Number (it tells position)
- "99" is a Nominal Number (it is basically just a name for the car)
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