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104 05 Integers Lesson
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104 05 Integers Lesson

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Basic lesson on add, subtract, multiply, divide integers

Basic lesson on add, subtract, multiply, divide integers

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  • 10/25/09 alg02_11 Bitsy Griffin

Transcript

  • 1. Integers +, -, x, / Basics 10/25/09 Algebra 1.1 Bitsy Griffin
  • 2. Integers
    • Whole numbers and their opposites.
    • Other vocabulary:
    • Opposites
    10/25/09 Algebra 1.1 Bitsy Griffin
  • 3. Essential Question:
    • What is an integer? How does one work in a math sentence?
    10/25/09 Algebra 1.1 Bitsy Griffin
  • 4. Absolute Value
    • Distance a # is from 0.
    • Always positive.
    • Read as:
    • The absolute value of . . .
    • |-6|
    10/25/09 Algebra 1.1 Bitsy Griffin
  • 5. Adding #’s w/same sign:
    • Add absolute values and tack on the sign.
    • Adding #’s w/ op signs:
    • Find difference of absolute values
    • Take sign of number that “appears” larger
    10/25/09 Algebra 1.1 Bitsy Griffin
  • 6. subtracting #’s
    • Add the opposite of the second #
    10/25/09 Algebra 1.1 Bitsy Griffin
  • 7. AV on Calculator
    • 2 nd 0 takes you to the catalogue.
    • abs is absolute value.
    • Hit enter.
    • Make sure you close the ().
    10/25/09 Algebra 1.1 Bitsy Griffin
  • 8. Multiply Positive Integers
    • Multiply or Divide any number of terms
    • Answer is always positive
    10/25/09 Algebra 1.1 Bitsy Griffin
  • 9. X or / Mixed or Negative Integers
    • Multiply or divide an even number of negative integers
    • Answer is always positive
      • Multiply or divide an odd number of negative integers
      • Answer is always negative
    10/25/09 Algebra 1.1 Bitsy Griffin
  • 10. Caution
    • Watch out for negative integers raised to powers
    • -3^2
    • (-3)^2
    • -3^3
    • (-3)^3
    10/25/09 Algebra 1.1 Bitsy Griffin
  • 11. Essential Question:
    • What is an integer? How does one work in a math sentence?
    10/25/09 Algebra 1.1 Bitsy Griffin