# Use Arrays to Work out Multiplication and Doubles

In this worksheet, students will decide whether a number is a multiple of 2, a multiple of 5, or both.

Key stage:  KS 1

Curriculum topic:   Number: Multiplication and Division

Curriculum subtopic:   Solve Multiplication/Division Problems

Difficulty level:

#### Worksheet Overview

In this activity, we will be looking at using arrays to make multiplication number sentences.

Let's have a look at what this array means:

We need to look at how many stars are in each row and how many rows there are.

There are 2 stars in each row.

There are 4 rows.

This is 4 sets of 2 and this is written as 4 x 2 =

After the = we write the total amount, how many stars altogether?

If we count down the 4 rows of 2 we can work it out! 2, 4, 6, 8.

There are 8 stars altogether, this gives us the multiplication sentence:

4 x 2 = 8

For some of the questions, we will look at doubling

Doubling is the same as multiplying by 2. Here we have 2 sets of 5 circles.

This is 5 + 5 as it is the same number added together.

This can also be written as 5 x 2 = or double 5 =

Double 5 = 10

This is because we have added both sets together: 5 + 5 = 10

Shall we have a go at some questions now?

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