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9-5 Evaluating Expressions with Integers
 

9-5 Evaluating Expressions with Integers

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9-5 Evaluating Expressions with Integers 9-5 Evaluating Expressions with Integers Presentation Transcript

  • 9-5 Evaluating Expressions with Integers Math Notes Algebra and Functions 1.2
  • Review Evaluate - To evaluate is to replace the variable with a given value to come to a final answer. n=7 n + 9 given value expression
  • Review Evaluate - To evaluate is to replace the variable with a given value to come to a final answer. n= 7 + 9 given value expression
  • Review Evaluate - To evaluate is to replace the variable with a given value to come to a final answer. n= 7 + 9= given value expression
  • Review Evaluate - To evaluate is to replace the variable with a given value to come to a final answer. n= 7 + 9 = 16 given value expression
  • Evaluate x + 9 for x = 12 x + 9 x = 12
  • Evaluate x + 9 for x = 12 x + 9 x = 12 STEP ONE: Substitute negative 12 for x
  • Evaluate x + 9 for x = 12 12 + 9 x= STEP ONE: Substitute negative 12 for x
  • Evaluate x + 9 for x = 12 12 + 9 x= STEP ONE: Substitute negative 12 for x STEP TWO: Draw 12 negatives
  • Evaluate x + 9 for x = 12 12 + 9 x= STEP ONE: Substitute negative 12 for x STEP TWO: Draw 12 negatives ------------
  • Evaluate x + 9 for x = 12 12 + 9 x= STEP ONE: Substitute negative 12 for x STEP TWO: Draw 12 negatives STEP THREE: The “+” means add. Add 9 negatives ------------
  • Evaluate x + 9 for x = 12 12 + 9 x= STEP ONE: Substitute negative 12 for x STEP TWO: Draw 12 negatives STEP THREE: The “+” means add. Add 9 negatives ------------ - - ------ -
  • Evaluate x + 9 for x = 12 12 + 9 x= STEP ONE: Substitute negative 12 for x STEP TWO: Draw 12 negatives STEP THREE: The “+” means add. Add 9 negatives ------------ - - ------ - How many altogether?
  • Evaluate x + 9 for x = 12 12 + 9 x= STEP ONE: Substitute negative 12 for x STEP TWO: Draw 12 negatives STEP THREE: The “+” means add. Add 9 negatives ------------ - - ------ - How many altogether? 21
  • Evaluate y - +10 for y = 5 + x - 10 y= 5
  • Evaluate y - +10 for y = 5 + x - 10 y= 5 STEP ONE: Substitute negative 5 for x
  • Evaluate y - +10 for y = 5 + 5 - 10 y= STEP ONE: Substitute negative 5 for x
  • Evaluate y - +10 for y = 5 + 5 - 10 y= STEP ONE: Substitute negative 5 for x STEP TWO: Draw 5 negatives
  • Evaluate y - +10 for y = 5 + 5 - 10 y= STEP ONE: Substitute negative 5 for x STEP TWO: Draw 5 negatives -----
  • Evaluate y - +10 for y = 5 + 5 - 10 y= STEP ONE: Substitute negative 5 for x STEP TWO: Draw 5 negatives STEP TWO: The “-” means take away, but there are NO positives to take away, BORROW that amount. -----
  • Evaluate y - +10 for y = 5 + 5 - 10 y= STEP ONE: Substitute negative 5 for x STEP TWO: Draw 5 negatives STEP TWO: The “-” means take away, but there are NO positives to take away, BORROW that amount. ----- ++++++++++ ----------
  • Evaluate y - +10 for y = 5 + 5 - 10 y= STEP ONE: Substitute negative 5 for x STEP TWO: Draw 5 negatives STEP TWO: The “-” means take away, but there are NO positives to take away, BORROW that amount. ----- ++++++++++ ---------- STEP THREE: Take away 10 positives. What are you left with?
  • Evaluate y - +10 for y = 5 + 5 - 10 y= STEP ONE: Substitute negative 5 for x STEP TWO: Draw 5 negatives STEP TWO: The “-” means take away, but there are NO positives to take away, BORROW that amount. ----- ---------- STEP THREE: Take away 10 positives. What are you left with?
  • Evaluate y - +10 for y = 5 + 5 - 10 y= STEP ONE: Substitute negative 5 for x STEP TWO: Draw 5 negatives STEP TWO: The “-” means take away, but there are NO positives to take away, BORROW that amount. ----- ---------- STEP THREE: Take away 10 positives. What are you left with? 15