Sean says that to add a number to negative 100 and still have negative 100 is to add zero. Candice says that she can add two numbers to negative 100 and still have negative 100 Who is correct and why?

Sean is right that adding zero leaves −100 unchanged. Candice can also add two numbers whose sum is zero, such as 7 and −7: −100 + 7 + (−7) = −100. The two numbers are opposites, so together they have the same effect as adding zero. Therefore, both are correct.

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