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# 10.4

Multiplying and Dividing Signed Numbers. 10.4. Multiplying. Multiplying Numbers. The product of two numbers having different signs is a negative number. The product of two numbers having the same sign is a positive number. Product of Like Signs (+)(+) = + ( ‒)(‒) = +.

## 10.4

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### Presentation Transcript

1. Multiplying Multiplying Numbers The product of two numbers having different signs is a negative number. The product of two numbers having the same sign is a positive number. Product of Like Signs (+)(+) = + (‒)(‒) = + Product of Different Signs (+)(‒) = ‒ (‒)(+) = ‒

2. Example Multiply. a. b.

3. Practice 1-5 on p 672 Multiply.

4. Example Evaluate. a. b.

5. Practice 6-10 on p 672 Multiply.

6. Dividing Dividing Numbers The quotient of two numbers having different signs is a negative number. The quotient of two numbers having the same sign is a positive number. Quotient of Like Signs Quotient of Different Signs

7. Example Divide. a. b.

8. Practice 11-14 on p 673 Divide.

9. Example Divide if possible. a. b. Is undefined because there is no number that gives a product of −6 when multiplied by 0.

10. 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.

11. Practice 17 A card player had a score of -13 for each of four games. Find the total score?

12. DONE

13. Example Multiply. a. b. c. 1 2

14. Practice 1-5 on p 672 Multiply.

15. Example Divide. a. b. c.

16. Practice 11-14 on p 673 Divide.

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