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Multiplying and Dividing Integers

Multiplying and Dividing Integers. Essential Question: How do I multiply and divide integers? Friday, December 20, 2019. Multiplication of Integers. -8. Evaluate: -2 + -2 + -2 + -2 = ________ Repeated addition is the same thing as:__________________

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Multiplying and Dividing Integers

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  1. Multiplying and Dividing Integers Essential Question: How do I multiply and divide integers? Friday, December 20, 2019

  2. Multiplication of Integers -8 Evaluate: -2 + -2 + -2 + -2 = ________ Repeated addition is the same thing as:__________________ ...so -2 + -2 + -2 + -2 can be written:________ Evaluate: -4 + -4 + -4 = ______________ Repeated addition is the same thing as:__________________ . ..so -4 + -4 + -4 can be written:________ Multiplication 4(-2) -12 Multiplication 3(-4)

  3. Multiplication of Integers -35 Evaluate: -7 + -7 + -7 + -7 + -7 = ______________ ...Rewrite as a multiplication problem:_________ Evaluate: -12 + -12 = ______________=_________ Evaluate: -1 + -1 + -1 + -1 + -1 = ______________=_________ 5(-7) -24 2(-12) -5 5(-1)

  4. Multiplication of Integers (+)(–) = (–) (–)(+) = (–) (+)(+) = (+) (–)(–) = (+)

  5. 7(-8) = _____ • 56 • -56 • -1 • -15

  6. -6(-7) = _____ • 49 • -42 • -13 • 42

  7. -9(3) = _____ • 27 • -6 • -36 • -27

  8. Which of the following statements is NOT true? • A negative multiplied by a negative is a positive product. • A positive multiplied by a negative is a negative product. • A negative multiplied by a negative is a negative product. • A negative multiplied by a positive is a negative product.

  9. Division of Integers Example 1: Negative divided by a Positive: -8 -8 so… or… Negative • Negative divided by a positive will always result in a:______________

  10. Division of Integers Example 2: Positive divided by a Negative: -7 -7 so… or… Negative • Positive divided by a negative will always result in a:______________

  11. Division of Integers c b a then The Division Algorithm: If Example 2: Negative divided by a Negative: 6 6 so… or… Positive • Negative divided by a negative will always result in a:______________

  12. Division of Integers Wait a minute…these look familiar! These are the same rules as:____________________________ A division problem with different signs is:______________ A division problem are the same signs is:_____________ Multiplication Negative Positive

  13. Evaluating Integer Expressions Friday, December 20, 2019

  14. Evaluate: • 8 • -8 • 7 • -9

  15. Evaluate: • 21 • -20 • -22 • -21

  16. Evaluate: • -7 • 7 • 8 • -6

  17. Evaluating Integer Expression • Today you will use the Order of Operations and your knowledge about integer operations to simplify some complex expressions. • Order of Operations: • Parentheses • Exponents • Multiplication and Division • Addition and Subtraction

  18. Evaluate: • -14 • -30 • 20 • -8 • I need help with this.

  19. Evaluate: • 315 • -105 • 3 • -76 • I need help with this.

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