CARDINAL ORDINAL AND NOMINAL NUMBERS

Cardinal Numbers :

Cardinal number is the number that denotes quantity of something. It answers the question, how many. So it is also called as counting numbers.

Example :

There are 3 cups in the above picture.

Ordinal Numbers :

Ordinal number is the number which gives us the exact position of an object. Ordinal number always tells the position of an object rather than their quantity.

Example :

Nominal Numbers :

Nominal number is the number which is used for identification only.

In other words, nominal represents the name of the number.

Examples :

Zip or postal code

Social security number

Codes

Note

Cardinal ----> How many

Ordinal ----> Position

Nominal ----> Name

The easiest way to remember the numbers

• Cardinal number counts how many.
• Ordinal number denotes the order of the number.
• Nominal number denotes the name of the number.

Problem 1 :

Complete according to the picture:

a) The frog is on the _______________ step.

b) The rabbit is on the ______________ step.

c) The bird is on the _____________ step.

d) The dog is on the _____________ step.

e) The snake is on the ____________ step.

Solution :

a) The frog is on the 10th step.

b) The rabbit is on the 9th step.

c) The bird is on the 5th step.

d) The dog is on the 3rd step.

e) The snake is on the 1st step.

Problem 2 :

1) What is the ordinal number for 9?

2) What is 6 + 7?

3) What is the ordinal number for 13?

4) What is the ordinal number for 100?

5) What is the 10 – 5?

6) What is the ordinal number for 1?

7) What is the ordinal number for 6?

8) What is 1 x 1?

9) What is the ordinal number for 50?

10) What is the ordinal number for 2?

11) What is 30 ÷15?

12) What is the ordinal number for 4?

13) What is the ordinal number for 21?

14) What is 35 + 15?

15) What is the ordinal number for 10?

16) What is the ordinal number for 1000?

17) What is 28 – 7?

18) What is the ordinal number for 3

Solution :

1) What is the ordinal number for 9?

The ordinal number of 9 is Ninth or 9th

2) What is 6 + 7?

The sum of 6 and 7 is 13.

3) What is the ordinal number for 13?

The ordinal number of 13 is thirteenth or 13th.

4) What is the ordinal number for 100?

The ordinal number of 100 is 100th.

5) What is the 10 – 5?

The difference between 10 and 5 is 5.

6) What is the ordinal number for 1?

The ordinal number of 1 is 1st.

7) What is the ordinal number for 6?

The ordinal number of 6 is 6th.

8) What is 1 x 1?

The product of 1 by 1 is 1.

9) What is the ordinal number for 50?

The ordinal number of 50 is 50th

10) What is the ordinal number for 2?

The ordinal number of 2 is 2nd.

11) What is 30 ÷15?

Dividing 30 by 15, we get 2.

12) What is the ordinal number for 4?

The ordinal number of 4 is 4th.

13) What is the ordinal number for 21?

The ordinal number of 21 is 21st.

14) What is 35 + 15?

The sum of 35 and 15 is 50.

15) What is the ordinal number for 10?

The ordinal number of 10 is 10th.

16) What is the ordinal number for 1000?

The ordinal number of 1000 is 1000th.

17) What is 28 – 7?

The difference between 28 and 7 is 21.

18) What is the ordinal number for 3

The ordinal number of 3 is 3rd.

Problem 3 :

Count the number of family members and tell whether there is an odd or even number of people. Write ‘E’ for even and ‘O’ for odd-

Solution :

There are 3 members in the family. It is odd.

Solution :

There are 4 members are in the family and it is even.

Solution :

There are 10 members are in the family and it is even.

Problem 4 :

Fill in the blanks-

a) September is the _______________ month of the year.

b) The fourth day of the week is ________________.

c) The sixth colour in the rainbow is _________________.

d) Tuesday is the _____________ day of the week.

e) ______________ is the eleventh month of the year.

Solution :

a) September is the 11^th month of the year.

b) The fourth day of the week is Wednesday 

c) The sixth colour in the rainbow is indigo.

d) Tuesday is the 3^rd day of the week.

e) September is the eleventh month of the year.

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