10/12/2014 ©evergreen public schools 2010 1 compare strategies
TRANSCRIPT
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04/11/23©Evergreen Public Schools
2010
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Compare Strategies
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Practice 3: Construct viable arguments and critique the reasoning of others
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CF1b I can solve a 2-step equation.
What do you know about equations?
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LaunchLaunchLaunchLaunchSolve:
3x + 15 = 24
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Marsha and Tara each solved the equation 3x + 15 = 24 differently.
Marsha and Tara each solved the equation 3x + 15 = 24 differently.
Marsha3x + 15 = 24
3x = 9
x = 3
Tara3x + 15 = 24 x + 5 = 8 x = 3
Who’s strategy is correct?
Vote with your feet!
Go to the corners.
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Are both strategies correct? How do you know?
Are both strategies correct? How do you know?
Marsha3x + 15 = 24
3x = 9
x = 3
Tara3x + 15 = 24 x + 5 = 8 x = 3
Describe each girl’s strategy.
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Use both strategies to solve these problems.
Use both strategies to solve these problems.
•2x – 8 = 14
•5x + 7 = 42
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DebriefDebrief
When is Marsha’s strategy better?
When is Tara’s strategy better?
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5
3
12
4
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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PracticePractice
Practice Two Step Equations CF.0.___
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Ticket Out
Solve
5x + 15 = 50