In this activity, we will learn about multiplying by 8.

To multiply by eight, we can use **repeated addition.**

Here is an octopus. One octopus has** eight **arms.

Let's think about what happens if we have 5 octopuses, each with 8 arms and we want to find the total number of arms!

We could count the arms one by one, but this would take a while!

Instead, let's use repeated addition to show the total.

5 groups of 8 looks like this as repeated addition:

8 + 8 + 8 + 8 + 8 = 40

There are 40 arms in total!

Now let's try an example of multiplying by 8, using repeated addition.

**Example**

Here are 4 octopuses. They each have 8 arms. How many arms in total?

**Answer**

In total, there are 8 + 8 + 8 + 8 = 32 arms.

What is 8 times 4?

8 × 4 = **32**

4 × 8 = **32**

Now that you understand repeated addition, let's try some more questions.