Algebra in Real Life

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Algebra in Real Life

• By Michael Every
• June 20, 2006

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Situation 1

• I have 13 friends coming to my party.
• I have ordered 3 pizzas.
• The pizzas are cut into 8 pieces.
• The pizza boxes are 14x14x1.5 inches.
• The party begins at 100pm
• Steve doesnt eat pizza.
• Frank wants to know how pieces he gets to eat.
• I want everyone to get fair share.

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What is the Question?

• Lets go back and look

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Situation 1

• I have 13 friends coming to my party.
• I have ordered 3 pizzas.
• The pizzas are cut into 8 pieces.
• The pizza boxes are 14x14x1.5 inches.
• The party begins at 100pm
• Steve doesnt eat pizza.
• Frank wants to know how many pieces he gets to
  eat.
• I want everyone to get fair share.

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Frank wants to know how many pieces he gets to
eat.

• Is this a question?
• Yes
• What information do we need to answer the
  question?
• Lets go back and check

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Situation 1

• I have 13 friends coming to my party.
• I have ordered 3 pizzas.
• The pizzas are cut into 8 pieces.
• The pizza boxes are 14x14x1.5 inches.
• The party begins at 100pm
• Steve doesnt eat pizza.
• Frank wants to know how many pieces he gets to
  eat.
• I want everyone to get fair share.

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Situation 1(necessary information)

• I have 13 friends coming to my party.
• I have ordered 3 pizzas.
• The pizzas are cut into 8 pieces.
• Steve doesnt eat pizza.
• Frank wants to know how many pieces he gets to
  eat.
• I want everyone to get fair share.

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Lets Create a Balanced Equation.

• What are the given proportions?
• 12 Friends with an equal amount of pizza.
• 3 pizzas with 8 slices each
• 12Friends 24 slices of pizza
• 12F 24S

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How do we solve our Balanced Equation?

• First decide which variable we need to solve
  forF or S?
• Solve for S tells us one Slice feeds many
  Friends.
• Solve for F tells us one Friend gets how many
  Slices.
• Correct! Solve for F

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Next Step

• We need the F variable by itself.
• We can use inverse operations to cancel values.
• 12F 24S
• What is the inverse operation?
• Correct! Divide by 12
• Remember to keep the equation balanced
• We apply the same operation to both sides

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How do I show my work?

• 12F 24S
• 12 12
• Divide both sides
• by 12
• F 2S

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If F 2S

• Then the answer to Franks question is
• He gets to eat 2 slices of pizza.

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Yeah! We solved our problem

• 1.)Create an equation
• 2.)Solve using inverse operations

Balanced Equations
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Lets watch the process in action

• Click on video to start

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Comprehension Quiz

• Solve with Inverse operations
• 6X 18
• 3 2X 13

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More practice

• Homework pages http//teacherweb.com/CA/EIS/Every/
  

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Works Cited
http//www5.unitedstreaming.com/index.cfm