3. Multiplication and division

Lesson

Can you remember another way to write a problem like 3+3+3+3, which is called repeated addition?

Write this addition as a multiplication. 3+3+3+3+3+3

Worked Solution

Idea summary

We can rewrite the addition as a multiplication using: \text{Number of groups}\times\text{Amount in each group}

In this video we see how adding the same number over and over is the same as multiplication.

Answer the following:

a

Write this addition as a multiplication: 12+12+12+12+12+12+12+12

Worked Solution

b

Find the value of 8 \times 12.

Worked Solution

Idea summary

If we add something over and over, it's like having many groups of that number. When we have groups of something, we call that multiplication, and we use \times for multiplication.

6+6+6+6+6 is the same as 5 groups of 6, or 5 \times 6.