What is the sum of 3 and 42?

What does it mean when someone asks you for the sum of 3 and 42? The sum is part of the addition equation displayed below.

addend + addend = sum

When someone asks "What is the sum of 3 and 42?" they mean that 3 is an addend and 42 is an addend in an addition equation.

Therefore, as you may have inferred, the sum of 3 and 42 is the same as 3 plus 42. Here is the addition equation with the answer:

3 + 42 = 45

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