What is the sum of 8 and 78?

The answer you get when you add 8 and 78 together is called the sum. The sum of 8 and 78 is displayed below:

86

In math terms, the sum of 8 and 78 would be written as follows:

8 + 78 = 86

When you need to find the sum of numbers such as 8 and 78, just remember that you need to add the numbers together to get the sum.

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