Coins Quandary Teacher Notes Vocabulary: system of equations Prepare 1 box (or envelope) per student. Supplies: pennies & nickels boxes or containers that.

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Coins Quandary Teacher 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

Coins Quandary Systems of Equations

Standards Target ©Evergreen Public Schools 20103

Standards Target ©Evergreen Public Schools 20104

Learning Target 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 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. Write up your problem and solution.

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.

How Many Coins? You can now open the box. Where you right?

More Money Work 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.

More Coins Work with a partner on this problem. Sheldon has pennies, nickels and dimes in his pocket. He has 50 coins worth $2.73. How many of each coin could he have? Find more than one solution. Write up your solution on the same paper.

Submit Your Solution Turn in your solutions to the problems you solved today.