# 3.02 Groups and arrays

Lesson

## Are you ready?

Do you remember how multiplication can be thought of as repeated addition?

1. Write this addition as a multiplication.

$10+10+10+10+10+10+10+10$10+10+10+10+10+10+10+10

2. Find the value of $8\times10$8×10.

## Learn

In this video we see how rows and columns (called an array), can be used to solve multiplication.

## Apply

Which of these number sentences describe the array?

1. There may be more than one correct answer.

$16\times8=2$16×8=2

A

$8\times2=16$8×2=16

B

$16\times2=8$16×2=8

C

$2\times8=16$2×8=16

D

$16\times8=2$16×8=2

A

$8\times2=16$8×2=16

B

$16\times2=8$16×2=8

C

$2\times8=16$2×8=16

D

Remember!

We get the same answer whichever way we look at our array.

### Outcomes

#### VCMNA155

Recall multiplication facts up to 10 × 10 and related division facts