Comparing & Ordering Numbers 1-50 Basic 1 Mathematics Lesson Note

Subject: Mathematics
Class: Primary 1
Topic: Comparing & Ordering Numbers 1-50
Duration: 40 minutes

Learning Objectives

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

• Count numbers from 41 to 50 and 1 to 50
• Count backwards from 50 to 1
• Write numbers 1-50 properly
• Compare and order numbers 1-20 using < and >

1. COUNTING SKILL: Numbers 41-50

Let’s Learn 41 to 50: 

41 – FORTY-ONE 

42 – FORTY-TWO 

43 – FORTY-THREE 

44 – FORTY-FOUR 

45 – FORTY-FIVE 

46 – FORTY-SIX 

47 – FORTY-SEVEN 

48 – FORTY-EIGHT 

49 – FORTY-NINE 

50 – FIFTY

Exercise 1: Count from 41 to 50: 41, 42, 43, 44, 45, 46, 47, 48, 49, 50

Exercise 2: Fill in the missing numbers:

1. 41, 42, ___, 44, ___
2. 45, ___, 47, ___, 49
3. 43, 44, ___, 46, ___

Exercise 3: Count from 1 to 50 (by tens): 1-10, 11-20, 21-30, 31-40, 41-50

Exercise 4: Complete these sequences:

1. 38, 39, 40, ___, ___, ___
2. 46, 47, ___, ___, 50
3. 35, 36, 37, ___, ___, ___

2. REVERSE COUNTING: 50 to 1

Counting Backwards from 50: 50, 49, 48, 47, 46, 45, 44, 43, 42, 41, 40, 39… 3, 2, 1

Exercise 5: Count backwards from 50 to 41: 50, 49, 48, 47, 46, 45, 44, 43, 42, 41

Exercise 6: Fill in backwards counting:

1. 50, 49, ___, 47, ___
2. 45, 44, ___, 42, ___
3. 40, 39, ___, 37, ___

Exercise 7: Complete backwards from these numbers:

1. 48, 47, ___, ___, ___
2. 35, 34, ___, ___, ___
3. 43, 42, ___, ___, ___

3. WRITING SKILL: Numbers 1-50

Practice Writing Numbers 41-50:

Exercise 8: Trace numbers 41-45: 41 41 41 41 42 42 42 42 43 43 43 43 44 44 44 44 45 45 45 45

Exercise 9: Trace numbers 46-50: 46 46 46 46 47 47 47 47 48 48 48 48 49 49 49 49 50 50 50 50

Exercise 10: Write numbers 1-50 in groups: 1-10: ___, ___, ___, ___, ___, ___, ___, ___, ___, ___ 11-20: ___, ___, ___, ___, ___, ___, ___, ___, ___, ___ 21-30: ___, ___, ___, ___, ___, ___, ___, ___, ___, ___ 31-40: ___, ___, ___, ___, ___, ___, ___, ___, ___, ___ 41-50: ___, ___, ___, ___, ___, ___, ___, ___, ___, ___

Exercise 11: Write the missing numbers:

1. 39, 40, ___, 42, ___
2. 47, ___, 49, ___
3. 44, 45, ___, ___, 48

4. COMPARING & ORDERING: Using < and >

Comparison Signs:

• < means “less than” (smaller number)
• > means “greater than” (bigger number)

Examples:

• 5 < 8 (5 is less than 8)
• 12 > 7 (12 is greater than 7)
• 3 < 15 (3 is less than 15)

Exercise 12: Compare these numbers using < or >:

1. 6 ___ 9
2. 15 ___ 10
3. 4 ___ 18
4. 20 ___ 13
5. 7 ___ 2

Exercise 13: Fill in the missing numbers:

1. 8 < ___
2. ___ > 5
3. 14 > ___
4. ___ < 19

Exercise 14: Circle the bigger number:

1. 11 or 7? ___
2. 3 or 16? ___
3. 20 or 12? ___
4. 9 or 17? ___

Exercise 15: Circle the smaller number:

1. 15 or 6? ___
2. 18 or 13? ___
3. 4 or 19? ___
4. 10 or 2? ___

Exercise 16: Put these numbers in order from smallest to largest:

1. 8, 3, 15, 1 → ___, ___, ___, ___
2. 18, 5, 12, 9 → ___, ___, ___, ___
3. 20, 7, 14, 2 → ___, ___, ___, ___

Exercise 17: Put these numbers in order from largest to smallest:

1. 6, 19, 4, 11 → ___, ___, ___, ___
2. 16, 1, 13, 8 → ___, ___, ___, ___

Exercise 18: True or False:

1. 14 > 9 ___
2. 5 < 3 ___
3. 20 > 17 ___
4. 12 < 8 ___

Homework

1. Practice counting from 1 to 50 and back to 1
2. Write numbers 41-50 five times each
3. Compare 10 pairs of numbers using < and > signs
4. Arrange your age and family members’ ages from smallest to largest
5. Find numbers around your house and compare them

Teacher: Use number lines and physical objects to help pupils visualize which numbers are bigger or smaller