2. Integer Discussion Board +, -

3. Let’s talk addition… »What are some strategies to solve integer addition problems like -14 + 37 ?

4. With your partner… Come up with two ways of finding the answer to that problem. I will choose a student at random to share out. Using a number line Remember the rule SCOREBOARD !

5. Use a number line! -14 + 37 010203040-10-20-30-4050-50   origin

6. -14 + 37 What rule applies here, SAME signs or DIFFERENT signs? Different signs - subtract - take the sign of the “bigger” numberRULE Shout out in

7. + - -14 + 37 37 14 Who won? The + Team! By how much? 37 -14 23 By 23 points Answer: +23 SCOREBOARD

8. What about Subtraction? »Herman solved - 22 - - 14 the following way: -22 - -14 = -22 + -14 = -36 Is this correct?

9. So the correct way is… The wrong step was… Then what is right.. Partner B: Partner A:

10. The Missing Link Herman remembered subtraction is the same as addition kind of…. But forgot the most important part! Subtracting is the same as adding the OPPOSITE

11. -22 - (-14) adding  the opposite  “add a line change the sign” Or “boom boom”

12. Write in the summary section of your notes: What do you do to solve 15-28 (write in words)? Solve it! Click to go to solution

13. 15 - 28 adding  the opposite  Shout out answer in answer in

14. Closure #2 Write in your notes... which method you will use to add and subtract with + and - integers.