Whole Numbers under Tens and Units – Primary 1 Mathematics Lesson Note (Second Term Week 9)

Here’s a clean, complete, and EEAT-optimized version of your lesson note for:

---

Mathematics – Primary 1 (Second Term)

Week 9: Whole Numbers under Tens and Units

Theme: Number and Numeration
Topic: Whole Numbers under Tens and Units
Duration: 40 minutes
Subject Teacher: ————
Class: Primary 1
Term: Second Term

---

Learning Objectives

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

1. Recognize and identify whole numbers under tens and units.
2. Break down numbers into tens and units.
3. Write and read whole numbers correctly.

---

Instructional Materials

• Place value charts
• Abacus or bundle sticks
• Flashcards showing numbers 1–100
• Counting objects (bottle tops, straws, sticks, etc.)

---

Previous Knowledge

Pupils have learned how to count and skip numbers forward and backward up to 130.

---

Introduction

Begin the lesson by showing pupils bundles of ten sticks and single sticks.
Ask:

• “How many sticks make one bundle?”
• “If I have 2 bundles and 4 single sticks, how many sticks do I have altogether?”

Explain that whole numbers are numbers that stand on their own — examples include 1, 2, 3, 4, 5, 6, and so on.
Each number can be split into tens and units.

---

Presentation

Step 1: Identification of Whole Numbers

Write the numbers 1 to 50 on the board and ask pupils to read them aloud.

Step 2: Explanation of Tens and Units

Explain that:

• Tens represent groups of ten (10, 20, 30, etc.).
• Units are the single numbers that stand alone.
  For example:
• 1 Ten = 10
• 2 Tens = 20
• 3 Tens = 30

Step 3: Expressing Numbers in Tens and Units

Use the place value chart to show how numbers are written.

Number	Tens	Units
12	1	2
24	2	4
33	3	3
45	4	5
53	5	3
65	6	5
84	8	4

Step 4: Practice Examples

Ask pupils to complete these:

1. 2 Tens 3 Units = 23
2. 4 Tens 4 Units = 44
3. 5 Tens 3 Units = 53
4. 6 Tens 5 Units = 65
5. 3 Tens 3 Units = 33
6. 8 Tens 4 Units = 84

---

Evaluation

Fill in the blanks correctly:

1. 2 Tens 1 Unit = ______
2. 3 Tens 5 Units = ______
3. 4 Tens 0 Units = ______
4. 5 Tens 6 Units = ______
5. 9 Tens 2 Units = ______

---

Conclusion

Explain again that every whole number can be broken down into tens and units. Allow pupils to create their own examples on the board.

---

Assignment

Write the following numbers in tens and units:

1. 12
2. 25
3. 38
4. 40
5. 59

---