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Adding whole numbers means that we are combining numbers to form a total.
We call the total in addition the sum. The sum always means addition - it is the total of when numbers are added together.
Let's look at an example:
3 + 4 = 7
The sum of 3 and 4 is 7.
The sum is what comes after the equals sign in an addition question.
Example
What is the sum of 13 and 3?
Answer
Start at 13 and count 3 forwards.
The sum of 13 and 3 is 16
Let's have a go at some questions now.
