Use Arrays to Work out Multiplication and Doubles

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?