1. Adding Integers! Using the Chip model

2. What is an Integer?  A whole number (so not a fraction)  Can be positive or negative  Includes zero Examples: 0, 1, -5, -223, 40,876

3. In your notebooks, brainstorm some answers to the following questions: 1. Why do we need negative numbers? 2. How can we use negative numbers? Think-Pair-Share

4. Integer Battle Videos https://www.youtube.com/watch?v=-ydGOdl7iLc http://vimeo.com/29634546

5. Zero Pairs  A pair of numbers who sum (addition) is zero  In the video we saw that a negative and positive cancelled each other out or battled—We call that finding zero pairs!

6. Chip Model - + - - -- -- - ++ + + ++ + Represent the problem with integer chips. Now find zero pairs! We have one positive chip left so our answer is… +

7. Try this one - + Represent the problem with integer chips. ++ + - - - Find the zero pairs! We have two negative chips left so… - -

8. More practice: - + Represent the problem with integer chips. - - - - - - - - - - Do we have zero pairs? Nope! Since negatives are on the same team they don’t battle! So we just add all the chips of the same color (sign) together!

9. One more: - + Represent the problem with integer chips. - - - - - -- - - - - No battles, no zero pairs! So our answer is…

10. Adding Integers with Chip Model Practice!