The result of an addition problem is called the sum.
The answer to an addition problem is called the sum.
The sum.
It is called the "sum".
addends
The result of an addition problem is called the sum.
The answer to an addition problem is called the sum.
The answer to an addition problem is called the sum.
A multiplication problem's answer is called a product. For a addition or subtraction problem it is called a sum.
The sum.
The result of an addition problem is called a sum.
It is called the "sum".
Sum
addends
A sum, perhaps.
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sum