Title of Notes: Subtraction Integers pg. 8 RS

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Title of Notes: Subtraction Integers pg. 8 RS

PICK A VOCABULARY WORD AND WRITE THE DEFINITION. CHAPTER 3 Bell work – 5 minutes PICK A VOCABULARY WORD AND WRITE THE DEFINITION. CHAPTER 3

The additive inverses (or opposites) of two numbers add to equal zero. Example: The additive inverse of 3 is -3 Proof: 3 + (-3) = 0 We will use the additive inverses for subtraction problems.

What’s the difference between 7 - 3 and 7 + (-3) ? Subtraction Rule What’s the difference between 7 - 3 and 7 + (-3) ? 7 - 3 = 4 and 7 + (-3) = 4 The only difference is that 7 - 3 is a subtraction problem and 7 + (-3) is an addition problem. “SUBTRACTING IS THE SAME AS ADDING THE OPPOSITE.” (Keep-change-change)

When subtracting, change the subtraction to adding the opposite (keep-change-change) and then follow your addition rule. Example #1: - 4 - (-7) - 4 + (+7) Diff. Signs --> Subtract and use larger sign. 3 Example #2: - 3 - 7 - 3 + (-7) Same Signs --> Add and keep the sign. -10

Video: Subtracting Integers 1:38 – 6:00 HTTPS://WWW.YOUTUBE.COM/WATCH?V=4GH2QLSDCFE Grab a small whiteboard!

Notebook Activity Pg. 8 LS Create a full page billboard on subtracting integers. Remember be creative. A billboard needs to catchy and fun so people will look at it.

Workbook pages 211 - 228 Start in class and finish as homework