1. Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. 10.4 Multiplying and Dividing Signed Numbers

2. Martin-Gay, Basic Mathematics, 4e 22 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Multiplying Multiplying Numbers The product of two numbers having the same sign is a positive number. The product of two numbers having different signs is a negative number. Product of Like Signs (+)(+) = + ( ‒ )( ‒ ) = + Product of Different Signs (+)( ‒ ) = ‒ ( ‒ )(+) = ‒

3. Martin-Gay, Basic Mathematics, 4e 33 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Example Multiply. a. b.

4. Martin-Gay, Basic Mathematics, 4e 44 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Practice 1-5 on p 672 Multiply. 1 2 3

5. Martin-Gay, Basic Mathematics, 4e 55 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Example Evaluate. a. b.

6. Martin-Gay, Basic Mathematics, 4e 66 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Practice 6-10 on p 672 Multiply. 6 7 8 9 10

7. Martin-Gay, Basic Mathematics, 4e 77 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Dividing Dividing Numbers The quotient of two numbers having the same sign is a positive number. The quotient of two numbers having different signs is a negative number. Quotient of Like SignsQuotient of Different Signs

8. Martin-Gay, Basic Mathematics, 4e 88 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Example Divide. a. b.

9. Martin-Gay, Basic Mathematics, 4e 99 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Practice 11-14 on p 673 Divide. 11 12

10. Martin-Gay, Basic Mathematics, 4e 10 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Example Divide if possible. a. b. Is undefined because there is no number that gives a product of −6 when multiplied by 0.

11. Martin-Gay, Basic Mathematics, 4e 11 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Example A professional golfer finished 4 strokes under par (−4) for each of three days of a tournament. What was her total score for the tournament? The golfer’s total score was −12 or 12 strokes under par.

12. Martin-Gay, Basic Mathematics, 4e 12 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Practice 17 A card player had a score of -13 for each of four games. Find the total score?

13. Martin-Gay, Basic Mathematics, 4e 13 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. DONE

14. Martin-Gay, Basic Mathematics, 4e 14 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Example Multiply. a. b. c. 1 2

15. Martin-Gay, Basic Mathematics, 4e 15 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Practice 1-5 on p 672 Multiply. 1 2 3 4 5

16. Martin-Gay, Basic Mathematics, 4e 16 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Example Divide. a. b. c.

17. Martin-Gay, Basic Mathematics, 4e 17 Copyright © 2011 Pearson Education, Inc. Publishing as Prentice Hall. Practice 11-14 on p 673 Divide. 11 12 13 14