What is the sum of 99 and 78?

The answer you get when you add 99 and 78 together is called the sum. The sum of 99 and 78 is displayed below:

177

In math terms, the sum of 99 and 78 would be written as follows:

99 + 78 = 177

When you need to find the sum of numbers such as 99 and 78, just remember that you need to add the numbers together to get the sum.

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