Cardinal and Ordinal Numbers

Cardinal numbers: 1, 2, 3, ...

• Numbers that indicate quantity.

• Numbers that indicate order.

• Numbers that represent a ratio.

• Numbers that are used in calculations.

12th

• twelfth

• tenth

• twenty-first

• eleventh

7th

• seventh

• first

• third

• fifth

March

• The second month of the year

• The third month of the year

• The first month of the year

• The fourth month of the year

Ordinal number for first

• 1st

• 2nd

• 3rd

• 4th

Difference between cardinal and ordinal numbers

• Cardinal numbers show quantity; ordinal numbers show position.

• Cardinal numbers indicate a sequence; ordinal numbers indicate a count.

• Cardinal numbers are used for counting; ordinal numbers are used for measuring.

• Cardinal numbers are always whole numbers; ordinal numbers can be fractions.

August

• The seventh month of the year

• The eighth month of the year

• The ninth month of the year

• The tenth month of the year

December

• The first month of the year

• The twelfth month of the year

• The sixth month of the year

• The ninth month of the year

Ordinal number for second

• 1st

• 2nd

• 3rd

• 4th

Saturday

• 5th day of the week

• 6th day of the week

• 7th day of the week

• 4th day of the week