Learn how to make arrays by making equal groups and building them into columns or rows.
This lesson includes:
- a catch-up quiz
- a video
- a learning summary
- one activity
To get started, let's see how well you know this topic already. Take the catch-up quiz below to find out.
Here are some doughnuts.
Let's arrange them into groups to count them.
There are 4 doughnuts in a row.
There are 2 rows.
We can write this as an addition.
4 + 4 = 8
or we can write this as a multiplication
4 x 2 = 8
There are 8 doughnuts altogether.
Archie wants to arrange some apples in an array.
He has made a full row and started the other rows. Can you fill in the rest?
How many apples in a row?
There are 5 apples in a row.
How many rows are there?
There are 4 rows.
As a repeated addition this is:
5 + 5 + 5 + 5 = 20
or written as a multiplication
5 x 4 = 20
There are 20 apples altogether.
Make sure you have the same number of things in each row.
Try this interactive activity to see if you can answer the question by making your own array.
Play Guardians: Defenders of Mathematica to learn more about this topic and test your skills.
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