2. 1-5 Adding and Subtracting Real Numbers

3. Problem 1: Using a Number Line Use a number line to find 3 + 5 45678 0123

4. Use a number line to find 3 + (– 5) 01234 -4-3-2

5. Use a number line to find – 3 + (– 5) 01234 -4-3-2

6. Problem 2: Adding Real Numbers Same sign, Add and keep Different signs, subtract Take the sign of the higher number Then you’ll be exact.

7. What is each sum?  – 12 + 7  – 18 + (– 2)

8. To subtract an integer “change the sign add a line” then follow the adding integers rules: Example: 1)3 – 5 = _____ 2)3 – (– 5) = _____ Problem 3: Subtracting Real Numbers

9. What is each difference

10. A reef explorer dives 25 feet to photograph brain coral and then rises 16 feet to travel over a ridge before diving 47 feet to survey the base of the reef. Then the diver rises 29 feet to see an underwater cavern. What is the location of the cavern in relation to sea level