1. Warm Up 1. 4 + (3 + 6) = (4 + 3) + 6 2. a(b – c) = ab – ac 3. 8 + -8 = 0 4. (ab)c = (ac)b 5. 3 + 2 = 5 6. Name each property Answers 1.Associative property of addition 2.Distributive property 3.Inverse property of addition 4.Commutative property 5.Closure 6. Inverse property of multiplication

2. Lesson 1.3 Operations with Integers SWBAT: Recognize, be able to solve problems involving addition, subtraction, multiplication and division of integers.

3. 1. Adding integers When signs are alike, add the numbers and keep the sign. Ex 1. -3 + -4 = ________ Ex 2. 12 + 20 = ________ -7 32

4. ● When signs are opposite, subtract the numbers and use the sign of the bigger number. Ex 3. -10 + 7 = _____ Ex 4. -12 + 14 = _____ 1. Adding integers continued -3 2

5. When subtracting integers, change the subtraction sign to an addition sign, and do the opposite to whatever follows. Ex 5. -5 - -3 = _______ Ex 6. -9 - 10= _______ 2. Subtracting integers -2 -19

6. 3. Comparing integers The number to the right on a number line is always larger. (>,<, =) Ex 7. -7 ___ -2 Ex 8. -5 ___ -8 < >

7. 4. Multiplying and Dividing Integers. When signs are alike, your answer is positive. Ex 9. (-4)(-2) = ______ Ex 10. 9(8) = ______ 8 72

8. When signs are opposite, your answer is negative. Ex. 11. -9 (4) = ______ Ex 12. 12 (-3) = ______ 4. Multiplying and Dividing Integers continued. -36

9. Your Turn 1. -5 + -2 = 2. 4 – 5 = 3. -3 – -6 = 4. (-3)4 = 5. (-4)(-4) = 6. 7(6)= 1.-7 2.-1 3.3 4.-12 5.16 6.42

10. Summary: Name the different sets of rules when adding, subtracting, multiplying, and dividing integers. How will you remember them? Worksheet Homework: