What is the sum of 25 and 55?

What does it mean when someone asks you for the sum of 25 and 55? The sum is part of the addition equation displayed below.

addend + addend = sum

When someone asks "What is the sum of 25 and 55?" they mean that 25 is an addend and 55 is an addend in an addition equation.

Therefore, as you may have inferred, the sum of 25 and 55 is the same as 25 plus 55. Here is the addition equation with the answer:

25 + 55 = 80

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What is the sum of 25 and 56?
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