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10/12/2014 ©Evergreen Public Schools 2010 1 Compare Strategies

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©Evergreen Public Schools 20102 Practice Target Practice 3: Construct viable arguments and critique the reasoning of others

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©Evergreen Public Schools 2010 3 Learning Target CF1b I can solve a 2-step equation. What do you know about equations?

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©Evergreen Public Schools 2010 4 LaunchLaunch Solve: 3 x + 15 = 24

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©Evergreen Public Schools 2010 5 ExploreExplore

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6 Marsha and Tara each solved the equation 3 x + 15 = 24 differently. Marsha 3x + 15 = 24 3x = 9 x = 3 Tara 3x + 15 = 24 x + 5 = 8 x = 3 Who’s strategy is correct? Vote with your feet! Go to the corners.

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©Evergreen Public Schools 2010 7 Marsha 3x + 15 = 24 3x = 9 x = 3 Tara 3x + 15 = 24 x + 5 = 8 x = 3 Describe each girl’s strategy.

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©Evergreen Public Schools 2010 8 2 x – 8 = 14 5 x + 7 = 42

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©Evergreen Public Schools 2010 9 Debrief When is Marsha’s strategy better? When is Tara’s strategy better?

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©Evergreen Public Schools 2010 10 5 3 1 2 4 Learning Target Did you hit the target? CF1b I can solve a 2-step equation. Rate your understanding of the target from 1 to 5. 5 is a bullseye!

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©Evergreen Public Schools 2010 11 Practice Practice Two Step Equations CF.0.___

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©Evergreen Public Schools 2010 12 Solve 5 x + 15 = 50

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