We can use a letter to represent an unknown value and make an expression for this total.
A question could look like this.
Example
A nursery has R building bricks and T bases to build them on.
Form an expression to represent the total.
Answer
We can say the total will be R + T
Easy, right?
Let's have a look at another example.
Example
Julie was a joiner and she charged £20 per hour.
If she worked for G hours, write an expression for the total pay she would receive for her work.
Answer
G hours at £20 per hour would be written as 20G.
Now you have the hang of it, let's try some questions!