What is the sum of 17 and 28?

What does it mean when someone asks you for the sum of 17 and 28? The sum is part of the addition equation displayed below.

addend + addend = sum

When someone asks "What is the sum of 17 and 28?" they mean that 17 is an addend and 28 is an addend in an addition equation.

Therefore, as you may have inferred, the sum of 17 and 28 is the same as 17 plus 28. Here is the addition equation with the answer:

17 + 28 = 45

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What is the sum of 17 and 29?
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