math lesson

1. ACTIVATING KNOWLEDGE
Read the name of each child below the
picture.

2. Drill
Identify the place value of
the underlined digit.
Tens Ones Thousands Hundreds Thousands Hundreds

3. Answer key

4. Lesson 3
ORDINAL NUMBERS
FROM
1ST TO 100TH

5. Motivation
Ask: Have you experienced falling in line
during recess or meal time
in the school canteen? What should you
observe when falling in
line?

6. Presenting the Lesson
Show the Filipino alphabet from the first
letter up to the last.
How many letters does the Filipino
alphabet have?

7. 1st
A 11th K 21th S
2nd B 12th L 22th T
3rd C 13th M 23th U
4th D 14th N 24th V
5th E 15th Ñ 25th W
6th F 16th NG 26th X
7th G 17th O 27th Y
8th H 18th P 28th Z
9th I 19th Q
10th J 20th R

8. how to write ordinal numbers.
To write ordinal numbers in symbol, connect
the number with theletters
st for numerals with the number 1
(1st, first),
nd for numerals with
the number 2 (2nd, second),
rd for numerals with the number 3 (3rd,
third), and
th for numerals with the number 4 and above
(4th, fourth)
Except for eleventh, twelfth, and thirteenth
(11th, 12th, 13th), all other
numbers take the letters th.

9. What is the 21st letter?
letter S
21st is an ordinal number.
How can ordinal numbers be written?
(Ordinal numbers can be written in
words or in symbols.)
Write or show: 21st can also be written as twenty-first
33rd as thirty-third
44th as forty-fourth

10. Change them into ordinal numbers.
1. 31 ______________4. 81 ______________
2. 45 ______________5. 68 ______________
3. 33 ______________6. 92 ______________
Performing the Activities
31st
45th
33rd
81st
68th
92nd

11. Change them into ordinal numbers.
1. 31 ______________4. 81 ______________
2. 45 ______________5. 68 ______________
3. 33 ______________6. 92 ______________
Performing the Activities
Thirty-first
Forty-fifth
Thirty-third
Eighty-first
Sixty-eighth
Ninety-second

12. Processing the Activities
What do we call numbers like 1st, 2nd, 3rd?
(ordinal numbers)
Ask the pupils to practice writing ordinal
numbers in words and in symbols.

13. Reinforcing the Concept
a. Name the fruit and tell its position from 21st
to 30th. Use mango as
the point of reference and denote it as the 21st.
21th

14. Summarizing the Lesson
What are ordinal numbers? What do they
tell?
How are they written?
To write ordinal numbers in symbol, use
superscript letters st for numerals with the
number 1(1st, first), nd for numerals with the
number 2 (2nd, second), rd for numerals with the
number 3 (3rd, third), and th for
numerals with the number 4 and above (4th,
fourth; 29th, twenty-ninth).

15. Applying to New and Other Situations
A. Basahin ang sitwasyon sa ibaba. Punan ang bawat
patlang ng tamang sagot. Isulat ang inyong sagot sa
sagutang papel.
1)Si Gng. Loren ay may 35 mag-aaral sa kaniyang
talaan. Si Teresa ay nakatala bago sa pinakahuli. Si
Teresa ay pang ilan sa talaan ?
34th
2)Ang nanay ay 50 taon ngayon. Sa susunod na
apat na taon ipagdiriwang niya ang pang ilan
niyang kaarawan?
54th

16. Evaluation
Pag-aralan ang pattern para malaman
ang nawawalang
ordinal. Isulat sa inyong sagutang papel.

17. Homework

18. 1) Sa buwan ng Oktubre, 2012, anong araw ang
tatapatan ng ika-15 araw ng buwan? ________
2) Anong araw naman ang tatamaan ng ika-30 ng
buwan? _______
3) Kung ang ika-1 ng Oktubre ay unang Biyernes ng
buwan, anong araw naman ang ika-21 ng buwan?
_______
4) Ano namang araw ang ika-10 araw ng buwan?
_______

19. EVALUATION
Answer Key: 9th, 13th, 21st, 26th, 44th, 50th, 67th,
71st, 91st, 93rd, 96th, 100th
Homework
Answer Key:
A.1) Monday 2) Tuesday 3) Sunday 4) Wednesday