The document explains the concept of ordinal numbers, which indicate the position or rank of objects or people in a specific sequence. It provides real-life examples and patterns for forming ordinal numbers from 1 to 100, including special endings and comparisons with cardinal and nominal numbers. Additionally, it includes exercises for identifying letters based on their ordinal positions.

1. ORDER
Mathematics Lesson

2. Order refers the arrangement
or disposition of people or
things in relation to each
other according to a
particular sequence, pattern,
or method. (Oxford, 2024).

3. Ordinal
Numbers

4. Ordinal Numbers
An ordinal number is a type
of number that is used to
represent the position or
rank of an object or a
person.

5. Real-life Examples of Ordinal
Numbers
• Ram came first in class
• Sarita was the third girl standing in a row
• Mohan stays on the fourth floor of the
apartment
• The table is kept at the sixteenth position
in the display of the shop
In these examples, circle (highlight) the ordinal numbers.

6. Real-life Examples of Ordinal
Numbers
• Ram came first in class
• Sarita was the third girl standing in a row
• Mohan stays on the fourth floor of the
apartment
• The table is kept at the sixteenth position
in the display of the shop

7. Ordinal
Numbers
From 1 to
50

8. Ordinal
Numbers
From 51
to 100

9. Don’t worry!
We have a way to
familiarize ourselves with
these ordinal numbers
faster.

10. Match the ending sound
1. Special Ordinal Numbers
1st ends in "st" like the word "first."
2nd ends in "nd" like the word "second."
3rd ends in "rd" like the word "third."
4th ends in "th" like the word "fourth."

11. Match the ending sound
1. Special Ordinal Numbers
1st ends in "st" like the word "first."
2nd ends in "nd" like the word "second."
3rd ends in "rd" like the word "third."
4th ends in "th" like the word "fourth."

12. Match the ending sound
2. For numbers 5th to 20th - All
of these end in th" (like "fifth"
and "twentieth") ".
Ordinal numbers that end with a “5”
typically have “fifth” in them.

13. Match the ending sound
3. For numbers 21st to 100th - The
pattern repeats every ten:
Look at the last digit (like 21, 32, 43).
If the last digit is 1, it ends in "st" (21st, 31st).
If the last digit is 2, it ends in "nd" (22nd, 32nd).
If the last digit is 3, it ends in "rd" (23rd, 33rd).
If the last digit is 4-9 or 0, it ends in "th" (24th,
25th, 30th).

14. Match the ending sound
In addition, numbers that ends
with a 0 (aside from 10) like 20, 30,
40, etc. have the “ieth” ending in
their ordinal forms.
“Twenty” becomes “twentieth”
not “twentyth”

15. Match the ending sound
In addition, numbers that ends
with a 0 (aside from 10) like 20, 30,
40, etc. have the “ieth” ending in
their ordinal forms.
“Twenty” becomes “twentieth”
not “twentyth”

16. LET’s TRY!

17. Difference Between Cardinal,
Nominal and Ordinal Numbers
Apart from ordinal numbers, the
other two types of numbers,
which are used to represent
objects or people are:
• Cardinal Numbers
• Nominal Numbers

18. Cardinal Numbers
The counting numbers which are
used to represent the number of
objects or people are called
Cardinal numbers. They are: One,
Two, Three, Four, Five, Six, Seven,
Eight, Nine, Ten and so on.

19. Cardinal Numbers
Example:
There are eight men
standing in a row.
The basket contains ten
apples.

20. Cardinal Numbers
Example:
There are eight men
standing in a row.
The basket contains ten
apples.

21. Nominal Numbers
The numbers which are applied to
name the objects in a group, are
called nominal numbers. Using
these numbers, it is easy to
identify objects or a thing in a
collection of things.

22. Nominal Numbers
Example:
Vehicles numbers like KA 05
1220, etc.
Pin codes of different cities
Player number in a match

23. Nominal Numbers
Example:
Vehicles numbers like KA 05
1220, etc.
Pin codes of different cities
Player number in a match

24. Identify the letter at the indicated place.
1st
A

25. Identify the letter at the indicated place.
4th
D

26. Identify the letter at the indicated place.
8th
H

27. Identify the letter at the indicated place.
11th
K

28. Identify the letter at the indicated place.
17th
Q

29. Identify the letter at the indicated place.
19th
S

30. Identify the letter at the indicated place.
20th
T

31. Identify the letter at the indicated place.
21st
U

32. Identify the letter at the indicated place.
24th
X

33. Identify the letter at the indicated place.
26th
Z

34. Pages 38-39

35. LET’s TRY! Part 2