Numbers & Quantities 1-20 Basic 1 Mathematics Lesson Note

Subject: Mathematics
Class: Primary 1
Topic: Numbers & Quantities 1-20
Duration: 30 minutes

Learning Objectives

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

• Count numbers 1-20 correctly
• Count backwards from 20 to 1
• Write numbers 1-20 properly
• Match numbers to the correct quantity of objects

1. COUNTING SKILL: Numbers 1-20

Let’s Count Together: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

Exercise 1: Count from 1 to 20: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20

Exercise 2: Fill in the missing numbers:

1. 1, 2, ___, 4, 5, ___, 7
2. 8, 9, ___, 11, ___, 13
3. 14, ___, 16, ___, 18, ___, 20

Exercise 3: Complete the sequences:

1. 5, 6, 7, ___, ___, 10
2. 12, 13, ___, ___, 16
3. 17, ___, ___, 20

2. REVERSE COUNTING: 20 to 1

Counting Backwards: 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1

Exercise 4: Count backwards from 20 to 1: 20, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1

Exercise 5: Fill in backwards counting:

1. 10, 9, ___, 7, ___, 5
2. 15, ___, 13, ___, 11
3. 20, 19, ___, ___, 16

Exercise 6: Start backwards counting from:

1. 12: ___, ___, ___, ___
2. 8: ___, ___, ___, ___
3. 18: ___, ___, ___, ___

3. WRITING SKILL: Numbers 1-20

Practice Writing Numbers:

Exercise 7: Trace numbers 1-10: 1 2 3 4 5 6 7 8 9 10

Exercise 8: Trace numbers 11-20: 11 12 13 14 15 16 17 18 19 20

Exercise 9: Write these numbers:

1. Five: ___
2. Twelve: ___
3. Eight: ___
4. Fifteen: ___
5. Twenty: ___

Exercise 10: Write the numbers in order:

Exercise 11: Write the missing numbers:

1. 3, 4, ___, 6, ___
2. 11, ___, 13, ___, 15
3. 18, ___, 20

4. RELATING NUMBERS TO QUANTITIES

Matching Numbers and Objects:

• 1 = one object
• 5 = five objects
• 10 = ten objects
• 15 = fifteen objects
• 20 = twenty objects

Exercise 12: Count and write the number:

1. 🍎🍎🍎🍎🍎 = ___
2. ⭐⭐⭐⭐⭐⭐⭐⭐⭐⭐ = ___
3. 🏀🏀🏀🏀🏀🏀🏀🏀🏀🏀🏀🏀 = ___
4. 🌟🌟🌟🌟🌟🌟🌟🌟🌟🌟🌟🌟🌟🌟🌟 = ___

Exercise 13: Draw the correct number of objects:

1. Draw 7 circles:
2. Draw 13 stars:
3. Draw 9 triangles:
4. Draw 16 dots:

Exercise 14: Match the number to the quantity:

• 8 → 🍎🍎🍎🍎🍎🍎🍎🍎🍎🍎🍎🍎 (12 apples)
• 12 → 🏀🏀🏀🏀🏀🏀🏀🏀 (8 balls)
• 6 → ⭐⭐⭐⭐⭐⭐ (6 stars)

Exercise 15: Circle the correct number of objects:

1. Show 11 objects: 🎈🎈🎈🎈🎈🎈🎈🎈🎈🎈🎈🎈🎈
2. Show 14 objects: 📚📚📚📚📚📚📚📚📚📚📚📚📚📚📚
3. Show 7 objects: 🖊️🖊️🖊️🖊️🖊️🖊️🖊️🖊️🖊️

Exercise 16: Write how many objects you see:

1. 🌺🌺🌺🌺🌺🌺🌺🌺🌺 = ___
2. 🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗 = ___
3. 🎨🎨🎨🎨🎨🎨🎨🎨🎨🎨🎨🎨🎨🎨🎨🎨🎨🎨 = ___

Exercise 17: Show the quantity with tally marks:

1. 5: ||||
2. 8: ________
3. 12: ________
4. 17: ________

Homework

1. Count from 1 to 20 and back to 1 five times
2. Write numbers 1-20 twice each in your exercise book
3. Count 15 different objects at home and write the numbers
4. Draw pictures to show quantities: 6, 11, 18
5. Practice matching numbers to quantities with family members

Teacher: Use real objects, fingers, and counting materials to help pupils understand the connection between numbers and quantities