1. Name:________________________________________________________________________________Date:_____/_____/__________ Fill-in-the-Blanks: 1)When adding SAME signs, we ___________ and ___________ the sign. 2)When adding DIFFERENT signs, we _____________________ and keep the sign of the larger absolute value (who wins the war). Evaluate: Spiral Back (Unit 1 Throw-Back): Circle ALL of the choices that represent the following: 7) 3) 24 + (-4) = _____4)-16 + (-14) = _____ 5) -55 + (-15) = _____6) -88 + 8 = _____ 0.6 = 6% 0.0660%

2. What: SUBtracting integers Why: To establish and apply the rules for subtracting integers. What: SUBtracting integers Why: To establish and apply the rules for subtracting integers. Today’s Lesson:

3. SAME SIGNS ADD ______ _______ 7 + 3 = 10 -7 + -3 = ___ DIFFERENT SIGNS _______________ Keep Sign of Larger Absolute Value 4 + -2 = 2 -4 + 2 = ___ Remember the addition rules?? SUBTRACT KEEP SIGN -10 -2

4. SUBTRACTING INTEGERS: DID YOU KNOW? ALL Subtraction problems are ____________________ problems in disguise! WHY? Because subtraction is defined as addition of the __________ (see below). addition Change these into addition problems: -3 – (-7) and -4 – 2 8 – 12 = 8 + (- 12) = -4 5 – (-1) = 5 + 1 = 6 K CC -3 + 7 KCC -4 + -2 opposite Once the subtraction problems become addition, just follow the addition rules! “kcc” strategy:

5. Re-write the following subtraction problems as addition problems (KCC): DO NOT SOLVE! 5 – 8-12 – 6-14 – (-7) 32 – 4-88 – (-11)8 – 10 Let’s practice our “KCC”: 5 + (-8) -12 + (-6)-14 + 7 8 + (-10) -88 + 1132 + (-4) Video

6. Evaluate the following examples (Use KCC first): 25 – 32 =-12 – (-4) =-11 – 7 = 62 – 4 =-80 – 11 =8 – (-15) = Now, let’s solve!: -7-8 -18 23 -9158 Again, once we re-write the subtraction problems as addition problems, we can follow the addition rules!!

7. END OF LESSON The next slides are student copies of the notes for this lesson. These notes were handed out in class and filled-in as the lesson progressed. NOTE: The last slide(s) in any lesson slideshow represent the homework assigned for that day.

8. Math-7 NOTES DATE: ______/_______/_______ What: subtracting integers Why: To establish and apply the rules for subtracting integers. What: subtracting integers Why: To establish and apply the rules for subtracting integers. NAME: Remember the addition rules?? SUBTRACTING INTEGERS: DID YOU KNOW? ALL Subtraction problems are _________________ problems in disguise! WHY? Because subtraction is defined as addition of the __________ (see below). “kcc” strategy: 8 – 12 = 8 + (- 12) = -4 5 – (-1) = 5 + 1 = 6

9. Evaluate the following examples (Use KCC first): 25 – 32 =-12 – (-4) =-11 – 7 = 62 – 4 =-80 – 11 =8 – (-15) = Re-write the following subtraction problems as addition problems (KCC): DO NOT SOLVE! 5 – 8-12 – 6-14 – (-7) 32 – 4-88 – (-11)8 – 10 Change these into addition problems: -3 – (-7) and -4 – 2 Once the subtraction problems become addition, just follow the addition rules! Now, let’s solve!: Again, once we re-write the subtraction problems as addition problems, we can follow the addition rules!!

10. “Subtracting Integers” Math-7 Homework NAME:________________________________________________________________________________DATE: _____/_____/__________

11. ... continued Use KCC for subtraction ONLY!!