Whole Numbers 1-30 (Continued) Basic 1 Mathematics Lesson Note

Subject: Mathematics
Class: Primary 1
Topic: Whole Numbers 1-30 (Continued)
Duration: 35 minutes

Learning Objectives

By the end of this lesson, pupils should be able to:

• Count numbers from 21 to 30 and 1 to 30
• Count backwards from 30 to 1
• Write numbers 21-30 and 1-30 properly
• Write numbers 1-10 in words

1. COUNTING SKILL: Numbers 21-30

Let’s Learn 21 to 30: 

21 – TWENTY-ONE 

22 – TWENTY-TWO 

23 – TWENTY-THREE 

24 – TWENTY-FOUR 

25 – TWENTY-FIVE 

26 – TWENTY-SIX 

27 – TWENTY-SEVEN 

28 – TWENTY-EIGHT 

29 – TWENTY-NINE 

30 – THIRTY

Exercise 1: Count from 21 to 30: 21, 22, 23, 24, 25, 26, 27, 28, 29, 30

Exercise 2: Fill in the missing numbers:

1. 21, 22, ___, 24, ___
2. 25, ___, 27, ___, 29
3. 23, 24, ___, 26, ___

Exercise 3: Count from 1 to 30: 1, 2, 3… 10, 11, 12… 20, 21, 22… 30

Exercise 4: Complete these sequences:

1. 18, 19, 20, ___, ___, ___
2. 26, 27, ___, ___, 30
3. 15, 16, 17, ___, ___, ___

2. REVERSE COUNTING: 30 to 1

Counting Backwards from 30: 30, 29, 28, 27, 26, 25, 24, 23, 22, 21, 20, 19, 18… 3, 2, 1

Exercise 5: Count backwards from 30 to 21: 30, 29, 28, 27, 26, 25, 24, 23, 22, 21

Exercise 6: Fill in backwards counting:

1. 30, 29, ___, 27, ___
2. 25, 24, ___, 22, ___
3. 20, 19, ___, 17, ___

Exercise 7: Complete backwards from these numbers:

1. 28, 27, ___, ___, ___
2. 15, 14, ___, ___, ___
3. 23, 22, ___, ___, ___

Exercise 8: Count backwards from 30 to 1: (Write the first 10 numbers) 30, 29, ___, ___, ___, ___, ___, ___, ___, ___

3. WRITING SKILL: Numbers 21-30 and 1-30

How to Write Numbers 21-30:

• 21 = twenty + one = 21
• 25 = twenty + five = 25
• 30 = thirty = 30

Exercise 9: Trace numbers 21-25: 21 21 21 21 22 22 22 22 23 23 23 23 24 24 24 24 25 25 25 25

Exercise 10: Trace numbers 26-30: 26 26 26 26 27 27 27 27 28 28 28 28 29 29 29 29 30 30 30 30

Exercise 11: Write numbers 1-30: 1-10: ___, ___, ___, ___, ___, ___, ___, ___, ___, ___ 11-20: ___, ___, ___, ___, ___, ___, ___, ___, ___, ___ 21-30: ___, ___, ___, ___, ___, ___, ___, ___, ___, ___

Exercise 12: Write the missing numbers:

1. 19, 20, ___, 22, ___
2. 27, ___, 29, ___
3. 24, 25, ___, ___, 28

4. WRITING NUMBERS 1-10 IN WORDS

Numbers in Words: 

1 = ONE 

2 = TWO 

3 = THREE 

4 = FOUR

 5 = FIVE 

6 = SIX 

7 = SEVEN 

8 = EIGHT 

9 = NINE 

10 = TEN

Exercise 13: Match numbers to words:

• 3 → SEVEN
• 7 → THREE
• 5 → TEN
• 10 → FIVE
• 8 → EIGHT

Exercise 14: Write these numbers in words:

1. 2 = _____
2. 6 = _____
3. 9 = _____
4. 4 = _____
5. 1 = _____

Exercise 15: Write the numbers for these words:

1. FIVE = ___
2. EIGHT = ___
3. THREE = ___
4. TEN = ___
5. ONE = ___

Exercise 16: Complete the words:

1. T_O (TWO)
2. S_X (SIX)
3. N_N_ (NINE)
4. F_UR (FOUR)
5. S_V_N (SEVEN)

Exercise 17: Circle the correct word:

1. 7 = (SEVEN/EIGHT)
2. 4 = (FIVE/FOUR)
3. 10 = (NINE/TEN)
4. 3 = (TWO/THREE)

Homework

1. Practice counting from 1 to 30 and back to 1
2. Write numbers 21-30 five times each
3. Write numbers 1-10 in words three times each
4. Count 25 objects at home and write the number
5. Practice saying number words 1-10 with family

Teacher: Use number charts and counting aids to help pupils visualize numbers 21-30