Counting and Writing of Whole numbers to 370 Fractions of a whole 1/2 and 1/4 Mathematics Primary 2 First Term Lesson Notes Week 6

Class: Primary 2

Subject: Mathematics

Topic: Counting and Writing Whole Numbers to 370, Fractions of a Whole (1/2 and 1/4)

Duration: 30 minutes

Instructional Materials:

• Number cards (0-370)
• Fraction cards (1/2 and 1/4)
• Whiteboard and markers
• Visual aids (optional)

Entry Behaviour: Begin by asking students to count from 1 to 100 as a warm-up exercise.

Behavioural Objectives: By the end of the lesson, students should be able to:

1. Count and write whole numbers up to 370.
2. Understand and recognize fractions of a whole, specifically 1/2 and 1/4.

Content:

1. Counting Whole Numbers 🧮

• We count numbers to know how many things there are.
• Imagine counting apples: 1, 2, 3, 4, 5, and so on. We can count up to a big number like 370.
• 🍎🍎🍎🍎🍎… up to 370 🍎🍎🍎🍎🍎

2. Writing Whole Numbers 📝

• We write numbers to show how many there are.
• For example, if we have 10 pencils, we write it like this: 10.
• We can write even bigger numbers like 100, 200, or 370.
• 100 pencils: 100 ✏️✏️✏️✏️…
• 200 pencils: 200 ✏️✏️✏️✏️✏️…
• 370 pencils: 370 ✏️✏️✏️✏️✏️…

3. Understanding Fractions (1/2) 🍰

• Fractions are like pieces of cake or pizza.
• When we say 1/2, it means we have one out of two equal parts.
• Imagine sharing a pizza with a friend. You get one-half, and your friend gets the other half.
• 1/2 🍕🍕

4. Understanding Fractions (1/4) 🍕🍕🍕🍕

• Fractions like 1/4 mean one out of four equal parts.
• Think about a pizza again. If you have one slice out of four, it’s 1/4.
• 1/4 🍕

5. Recognizing Fractions 🧩

• Look around, and you might see 1/2 and 1/4 in everyday things.
• For example, a sandwich cut in half is 1/2. 🥪🥪
• A chocolate bar with four pieces, where you eat one, is 1/4. 🍫🍫🍫🍫
• 🥪 1/2 and 🍫 1/4

Remember, counting and writing numbers helps us understand how many things we have, and fractions show us parts of a whole, like pieces of pizza or cake! 🍰🧮📝

. Half (1/2):

• When we talk about half, we mean dividing something into two equal parts.
• Let’s take the number 8. If we want to find half of 8, we split it into two equal groups:
  • Group 1: 4
  • Group 2: 4
• So, half of 8 is 4. We write it as 8 ÷ 2 = 4.
• It’s like sharing 8 candies with a friend. You get 4, and your friend gets 4.

2. Quarter (1/4):

• When we talk about a quarter, we mean dividing something into four equal parts.
• Let’s take the number 16. If we want to find a quarter of 16, we split it into four equal groups:
  • Group 1: 4
  • Group 2: 4
  • Group 3: 4
  • Group 4: 4
• So, a quarter of 16 is 4. We write it as 16 ÷ 4 = 4.
• It’s like dividing a big pizza into four slices. Each slice is a quarter.

3. Using 10 and 12:

• If we want to find half of 10, we split it into two equal groups:
  • Group 1: 5
  • Group 2: 5
• So, half of 10 is 5. We write it as 10 ÷ 2 = 5.
• For 12, half of it is 6. We write it as 12 ÷ 2 = 6.
• It’s like sharing 10 toys, and each person gets 5. Or sharing 12 cookies, and each person gets 6.

4. Recap:

• Half means dividing into two equal parts.
• Quarter means dividing into four equal parts.
• We use these to share things equally or find out how many parts we have of a whole.

Remember, math helps us share things, solve problems, and understand the world around us! 🧮🍰🍕🎉

Evaluation :

1. To find half of 8, we split it into ________________ equal parts. a) 3 b) 2 c) 4 d) 5
2. Half of 10 is ________________. a) 8 b) 2 c) 5 d) 20
3. When we talk about a quarter, we mean dividing something into ________________ equal parts. a) 3 b) 4 c) 5 d) 6
4. A quarter of 16 is ________________. a) 4 b) 8 c) 2 d) 12
5. To find half, we divide something into ________________ parts. a) 3 b) 2 c) 4 d) 5
6. Half of 12 is ________________. a) 6 b) 3 c) 8 d) 4
7. Quarter means dividing into ________________ equal parts. a) 3 b) 4 c) 5 d) 6
8. A quarter of 10 is ________________. a) 5 b) 2 c) 10 d) 4
9. Half of 16 is ________________. a) 8 b) 4 c) 12 d) 2
10. To find a quarter, we divide something into ________________ parts. a) 3 b) 2 c) 4 d) 5
11. A quarter of 8 is ________________. a) 4 b) 8 c) 2 d) 12
12. Half means dividing into ________________ equal parts. a) 3 b) 2 c) 4 d) 5
13. A quarter of 12 is ________________. a) 6 b) 3 c) 8 d) 4
14. To find half of 10, we split it into ________________ equal groups. a) 5 b) 2 c) 3 d) 4
15. Half of 8 is ________________. a) 12 b) 6 c) 3 d) 4

16. Explain what “half” means using an example with objects you can share.
17. Describe what “quarter” means and how it relates to dividing things.
18. Find half of the number 14 and explain the steps you would take.
19. Imagine you have a pizza with 8 slices. How many slices would be in a quarter of that pizza, and how would you write it as a fraction?
20. Can you use the idea of “half” and “quarter” to share 16 candies equally with your friends? How many candies would each friend get?

Step by Step Presentation:

Step 1: Counting Whole Numbers (10 minutes)

• Use number cards or a whiteboard to demonstrate counting from 1 to 370.
• Encourage students to join in and count along.

Step 2: Writing Whole Numbers (5 minutes)

• Ask students to take turns writing random whole numbers on the whiteboard between 1 and 370.
• Ensure that they practice writing numbers accurately.

Step 3: Introduction to Fractions (5 minutes)

• Explain that a fraction is a part of a whole.
• Show fraction cards for 1/2 and 1/4.
• Use visual aids if available to represent these fractions visually.

Step 4: Understanding 1/2 (5 minutes)

• Focus on 1/2. Explain that it means one out of two equal parts.
• Give examples of dividing objects into halves, like a sandwich or a circle.
• Show how to write and read 1/2.

Step 5: Understanding 1/4 (5 minutes)

• Focus on 1/4. Explain that it means one out of four equal parts.
• Give examples of dividing objects into quarters, like a pizza or a square.
• Show how to write and read 1/4.

Step 6: Practicing Fractions (5 minutes)

• Ask students to identify and circle 1/2 and 1/4 fractions on fraction cards.
• Write simple fractions on the whiteboard and have students identify them.

Conclusion (2 minutes)

• Summarize the lesson by emphasizing the importance of counting, writing whole numbers accurately, and understanding fractions.

Homework: Assign homework exercises that involve counting and writing whole numbers up to 370 and recognizing fractions of 1/2 and 1/4 in everyday objects