What is the sum of 51 and 87?

The answer you get when you add 51 and 87 together is called the sum. The sum of 51 and 87 is displayed below:

138

In math terms, the sum of 51 and 87 would be written as follows:

51 + 87 = 138

When you need to find the sum of numbers such as 51 and 87, just remember that you need to add the numbers together to get the sum.

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