Using Arrays
This week we will be learning about arrays. Watch the first video on this page to remind yourself what arrays are.
What is an array?
An array is a way of representing multiplication facts in a diagram or picture. It is always rectangular and made up of rows and columns.
An array is helpful for calculating multiplication statements, for example, 2 x 4 which can be shown using this array:
-
There are 2 rows of apples and 4 apples in each row.
-
There are 4 columns of apples and 2 apples in each column.
This array shows the multiplication statements 2 x 4 and 4 x 2.
The array has 8 apples in total. This tells us that 2 x 4 and 4 x 2 are both equal to 8.
2 x 4 = 8 and 4 x 2 = 8
Task 1
Use the interactive tool that is under Activity 2 on the website to answer the questions.
It looks like this:
Task 2
Answer these questions.
