## Key Concepts

• Addition of Positive and Negative Integers
 $5+3$ $-5+\left(-3\right)$ Both positive, Sum positive Both negative, Sum negative When the signs are the same, the counters would be all the same color, so add them. $-5+3$ $5+\left(-3\right)$ Different signs, More negatives Different signs, More positives Sum negative Sum positive When the signs are different, some counters would make neutral pairs; subtract to see how many are left.