1. 2-4 Adding Integers Write and solve an addition expression for the following temperature change. The temperature dropped 2 degrees in one hour, the next hour it dropped 3 degrees, the third hour it rose 4 degrees, and the fourth hour it fell 5 degrees.

2. Same Signs Add the absolute values and use the common sign 5+ 6= 11 Positive + Positive = Positive -5 + (-6) = -11 Negative + Negative = Negative 1) -2 + (-4) =2) 12 + 5 = 3) -11 + (-16) =

3. Different Signs  SUBTRACT their absolute values  The sum is: Positive if the positive integer’s absolute value is greater (more positives) Negative if the negative integer’s absolute value is greater (more negatives)  Examples : 4) 12 + (-6) = 5) 5 + (-8) = 6) -2 + 7 = 7) -6 + 4 =