Lesson Notes By Weeks and Term v5 - Grade 2

Lesson Video

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Performance objectives

• Explain multiplication as repeated addition.
• Solve simple multiplication problems using pictures and adding.
• Write multiplication number sentences (e.g., 4 x 5 = 20).
• Explain division as repeated subtraction.
• Solve simple division problems by subtracting.

Lesson summary

Introduction This week, we introduce our Grade 2 learners to the foundational concepts of multiplication and division. Instead of treating these as entirely new operations, we will build upon their strong existing knowledge of addition and subtraction. The core idea is to understand multiplication as a fast way of doing repeated addition and division as a practical application of repeated subtraction.

Lesson notes

This section breaks down the core ideas of multiplication and division for Grade 2 learners. The focus is on the "why" and "how," using practical examples. A. Multiplication is Repeated Addition What is it? Multiplication is a shortcut for adding the same number many times. When we have equal groups of objects, we can multiply to find the total quickly.

Key Vocabulary: Groups of: This is the most important phrase. "3 groups of 4" means we have 4 items, and we have 3 sets of them.

Multiply / Times: These are the action words for multiplication. ×: This is the multiplication symbol. We read it as "times". How it Works (The "Why"): Imagine you are at a party and you see 4 plates. On each plate, there are 2 pieces of chicken.  To find the total number of chicken pieces, we can count them all. Or, we can add them up: `2 + 2 + 2 + 2` This is a repeated addition sum. The number `2` is repeated `4` times. Multiplication gives us a faster way to write this. We can say we have 4 groups of

2. As a multiplication number sentence, we write: `4 × 2 = 8` Both methods give us the same answer, 8.

Worked example

Problem: Busi buys 3 bags of marbles. Each bag has 5 marbles inside. How many marbles does Busi have altogether?

Step-by-step Solution:

Identify the groups: The bags are the groups. There are 3 groups.

Identify the number in each group: There are 5 marbles in each group.

Write the repeated addition sum: We are adding 5, three times.

`5 + 5 + 5`

Calculate the sum:

5 + 5 = 10

10 + 5 = 15

So, `5 + 5 + 5 = 15`.

Write the multiplication number sentence: This is "3 groups of 5".

`3 × 5 = 15`

Answer in a full sentence: Busi has 15 marbles altogether.

B. Division is Repeated Subtraction

What is it?

Division helps us do two things: sharing things equally or making equal groups. We will focus on division as making equal groups, which connects directly to repeated subtraction. It's about finding out how many times you can take away a certain number from a total.

Key Vocabulary:

Divide / Share: These are the action words for division.

Groups / Sets: We are finding out how many equal groups we can make.

÷: This is the division symbol. We read it as "divided by".