1. Today’s Lesson: What: Multiplying and dividing integers Why: To establish the rules for multiplying and dividing integers. What: Multiplying and dividing integers Why: To establish the rules for multiplying and dividing integers.

2. 3(-3) = -9 MODELS FOR Multiplying INTEGERS: 2(____) = -10 Three groups of negative 3 is -9! Two groups of negative 5 is -10!

3. - - - - -- MODEL FOR dividing INTEGERS: -6 ÷ _____ = -3 What other problem is this a model of ??? Answer: 2(-3) = -6

4. Rules for multiplying And dividing integers: SAME SIGNS ____________ _ ANSWER 3 ● 4 = 12 -3 ●-4 = 12 DIFFERENT SIGNS ____________ _ ANSWER -3 ● 4 = -12 3 ● -4 = -12 POSITIVENEGATIVE 6 ÷ 3 = 2 -6 ÷ -3 =2 -6 ÷ 3 = -2 6 ÷ -3 = -2

5. Multiplication/ division memory “tricks”: Make a Tic-Tac-Toe Board with “P’s” in the diagonal and “N’s” in all the other spaces. Read board in any direction— up, down, left, right, diagonal– from the outside in, and it will give you the right answer. P= positive N= negative Fill in your letters...

6. Smiley Face Method: Smile = _________________ answer Frown =_________________ answer We like to sleep! We don’t like to be hit in the eye! + - - + POSITIVE NEGATIVE + -

7. Evaluate the following examples: 1. 8(-6) =2. -12(-4) = 3. -11 ∙ 7 = 4. 48 ÷ - 4 =5. -28 / -7 =6. 150 / -5 = 7.21(-8) =8. -56 / 8 = 9. 25.2 ∙ 3.5 = -4848-77 -12 4 -30 -168-7 88.2

8. 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 (entitled “Practice Work”) represent the homework assigned for that day.

9. MODELS FOR Multiplying INTEGERS: Math-7 NOTES DATE: ______/_______/_______ What: Multiplying and dividing integers Why: To establish the rules for multiplying and dividing integers. What: Multiplying and dividing integers Why: To establish the rules for multiplying and dividing integers. NAME: 2(____) = -10 3(-3) = -9 Three groups of negative 3 is -9! Two groups of negative 5 is -10! Rules for multiplying And dividing integers: SAME SIGNS ________ ANSWER 3 ● 4 = 12 -3 ● -4 = 12 DIFFERENT SIGNS _________ ANSWER -3 ● 4 = -12 3 ● -4 = -12 MODEL FOR DIVIDING INTEGERS: - - - - -- -6 ÷ _____ = -3 What other problem is this a model of ??? 6 ÷ 3 = 2 -6 ÷ -3 = 2 -6 ÷ 3 = -2 6 ÷ -3 = -2

10. Multiplication/ division memory “tricks”: + - + + -- Evaluate the following examples: 1. 8(-6) =2. -12(-4) =3. -11 ∙ 7 = 4. 48 ÷ - 4 =5. -28 / -7 =6. 150 / -5 = 7. 21(-8) =8. -56 / 8 =9. 25.2 ∙ 3.5 = Make a Tic-Tac-Toe Board with “P’s” in the diagonal and “N’s” in all the other spaces. Read board in any direction— up, down, left, right, diagonal– from the outside in, and it will give you the right answer. Smiley Face Method: Smile = __________ answer Frown= __________ answer We like to sleep! We don’t like to be hit in the eye! P= positive N= negative

11. Math-7 PRACTICE DATE: ______/_______/_______ NAME:__________________________ “multiply/ divide INTEGERS” Multiplication:Multiplication:

12. Division:Division: