coins quandary teacher notes vocabulary: system of equations prepare 1 box (or envelope) per...
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Coins QuandaryTeacher Notes
Coins QuandaryTeacher Notes
Vocabulary: system of equations• Prepare 1 box (or envelope) per student.• Supplies:• pennies & nickels• boxes or containers that can be closed and are not
see-through• Grouping: Individual
Systems of Equations Learning Targets Create equations with 2 variables to represent relationships
between two quantities with equations and tables. Solve a system of linear equations algebraically to find an
exact solution.
©Evergreen Public Schools 2010 5
What does a system of equations look
like?
Unit Launch• Do NOT open the box.• The box has pennies and nickels.You will know • the number of coins in the box.• the value of the coins in the box.Your task:• How many of each coin are in the box?Be prepared to explain your thinking.
Share Your Solution• Do NOT open the box.• Your will be paired up someone that had a
different problem than yours.• Person A will share their solution with Person B.• Person B will listen and verify Person A’s solution.• Person A will edit results if needed.Now reverse the process.
How Many Coins?• Do NOT open the box.• Some students will present their solution to
the class.• As you listen you may make changes to your
work.
More MoneyWork with a partner on this problem.• Penny has nickels and dimes in her pocket. She has 53
coins worth $4.20. • How many of dimes does she have? • Write up your solution on the same paper.