What is the sum of 9 and 99?

The answer you get when you add 9 and 99 together is called the sum. The sum of 9 and 99 is displayed below:

108

In math terms, the sum of 9 and 99 would be written as follows:

9 + 99 = 108

When you need to find the sum of numbers such as 9 and 99, just remember that you need to add the numbers together to get the sum.

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