Melody stated that the sum of a positive and a negative integer equals a negative integer or 0.

Use these numbers to answer the questions:

–7, 3, 8, –5, 7



(a) Is this statement always true, sometimes true, or always false? Write three equations to support your answer.

(b) Pretend that you need to explain to a friend what happens how you determine whether a sum will be positive, negative, or 0 when adding a positive and a negative decimal.