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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 (+)(+) = + ( ‒)(‒) = +.

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10.4

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  1. Multiplying and Dividing Signed Numbers 10.4

  2. 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 (+)(‒) = ‒ (‒)(+) = ‒

  3. Example Multiply. a. b.

  4. Practice 1-5 on p 672 Multiply.

  5. Example Evaluate. a. b.

  6. Practice 6-10 on p 672 Multiply.

  7. 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

  8. Example Divide. a. b.

  9. Practice 11-14 on p 673 Divide.

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

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

  13. DONE

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

  15. Practice 1-5 on p 672 Multiply.

  16. Example Divide. a. b. c.

  17. Practice 11-14 on p 673 Divide.

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