2. Section 3-4 Adding Integers

3. 1. Objective: Add integers

4. 2. When adding integers with the same sign, add them and give the answer the same sign. (Same + = same)

5. Example: 4 + 8 = 12 -4 + (-8) = -12

6. 3. When adding integers with different signs, subtract and take the sign of the largest (absolute value). (diff - = lg)

7. Example: -12 + 10 = -2 6 + (-10) = -4

8. 4. Additive inverse property –The sum of any number and its additive inverse is 0. Example: -7 + 7 = 0

9. -16 -8 + -8 =

10. 5 + (-3) = 2

11. 6 7 + (-1) =

12. -14 -30+16 =

13. 2 -9 +11 =

14. Evaluate each expression if x = -10, y = 7, and z = -8 4 X + 14 =

15. Evaluate each expression if x = -10, y = 7, and z = -8 -1 y + z =

16. Evaluate each expression if x = -10, y = 7, and z = -8 -13 Z + (-5) =

17. Evaluate each expression if x = -10, y = 7, and z = -8 -3 x + y=

18. Evaluate each expression if x = -10, y = 7, and z = -8 -20 -10 + x