Adding Integers We can use positive and negative counters to model the addition of integers. Positive IntegerNegative Integer A positive integer paired with a negative integer form a zero pair. The value of a zero pair is 0.
Adding Integers with like signs. - When the signs are the same, add the numbers together and keep the sign. -9 + -3 = -12 Adding integers with unlike signs. - When the signs are different, subtract the integers and keep the sign of the larger integer. -9 + 3 = -6