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Strategies for Solving Integer Addition and Subtraction Problems

In this discussion, we will explore effective strategies for solving integer addition and subtraction problems, such as -14 + 37. Partner up to brainstorm two methods for tackling these equations. We will emphasize the importance of using a number line as a visual aid and understanding the rules for adding and subtracting integers – including handling same and different signs. You’ll also practice by solving problems like -22 - (-14) and identifying errors in calculations. Let's collaborate, share our methods, and enhance our understanding of integers!

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Strategies for Solving Integer Addition and Subtraction Problems

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Presentation Transcript

  1. Integer DiscussionBoard + , -

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

  3. 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. Remember the rule Using a number line SCOREBOARD !

  4. Use a number line! -14 + 37  -50 -40 -30 -20 -10 0 10 20 30 40 50  origin

  5. RULE -14 + 37 What rule applies here, SAME signs or DIFFERENT signs? Different signs - subtract - take the sign of the “bigger” number 1 2 3 Shout out in

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

  7. Yes No What about Subtraction? • Herman solved -22 - -14 the following way: -22 - -14 = -22 + -14 = -36 Is this correct?

  8. Then what is right.. Think Pair Share Partner B: Partner A: Thewrongstep was… So thecorrect wayis…

  9. 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

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

  11. 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

  12. the opposite  15 - 28  adding 1 2 3 Shout out answer in

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

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