What is the sum of 21 and 79?

The answer you get when you add 21 and 79 together is called the sum. The sum of 21 and 79 is displayed below:

100

In math terms, the sum of 21 and 79 would be written as follows:

21 + 79 = 100

When you need to find the sum of numbers such as 21 and 79, just remember that you need to add the numbers together to get the sum.

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