1. Unit 1: Number Sense Minds On

2. Unit 1: Number Sense Review: Operations with Negative Numbers Learning Goals: I can add and subtract negative numbers I can multiply and divide negative numbers

3. Unit 1: Number Sense Review: Operations with Negative Numbers Multiplying and Dividing If the signs are the answer will be positive. If the sign are the answer will be negative.

4. Unit 1: Number Sense Review: Operations with Negative Numbers Multiply or Divide

5. Unit 1: Number Sense Review: Operations with Negative Numbers In Summary: A Positive multiplied or divided by another Positive results in a: A Positive multiplied or divided by a Negative results in a: A Negative multiplied or divided by a Positive results in a: A Negative multiplied or divided by another Negative results in a:

6. Unit 1: Number Sense Review: Operations with Negative Numbers

7. Unit 1: Number Sense Review: Operations with Negative Numbers

8. Unit 1: Number Sense Review: Operations with Negative Numbers Adding and Subtracting: Step One: If there are two signs beside each other, reduce them to one sign Example: +3 + (-6) Step Two: think of the signs as representing teams (a positive team and a negative team) Step Three: Check who won, and by how much The winning team determines the sign of the answer (+ or - ) How much they won by determines the number of the answer

9. Unit 1: Number Sense Review: Operations with Negative Numbers Example: -5- (-8) Step One: Reduce to one sign

10. Unit 1: Number Sense Review: Operations with Negative Numbers Example: -5 + 8 Step Two: Think of Teams

11. Unit 1: Number Sense Review: Operations with Negative Numbers Example: -5 + 8 Step Three: Who won? By how much? Negative team has 5 Positive team has 8

12. Unit 1: Number Sense Review: Operations with Negative Numbers Example: +5- (+6) Reduce to one sign +5 - 6 Who won? Negative Team By How much? 1

13. Unit 1: Number Sense Review: Operations with Negative Numbers Example: +5 – (-1) Positive team had to win because the negative team didn’t show up

14. Unit 1: Number Sense Review: Operations with Negative Numbers Example: -3 + -2 Negative team had to win because the positive team didn’t show up

15. Unit 1: Number Sense Review: Operations with Negative Numbers Lisa says that if you add two opposite integers their sum is always zero. Is Lisa correct?

16. Unit 1: Number Sense Review: Operations with Negative Numbers Janet says that two negatives makes a positive? Is she correct? Look at all four operations.

17. Unit 1: Number Sense Review: Operations with Negative Numbers Sam says that if you subtract any two negative numbers the difference is always negative. Is he correct?

18. Unit 1: Number Sense Review: Operations with Negative Numbers

19. Unit 1: Number Sense Review: Operations with Negative Numbers Practice Addition/Subtraction:  Read pg. 18 Ex #1 and #2  Complete #1, 3, 5 Multiplication/Division:  Read top of page 19  Complete #1 - 4