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QR Challenge: Variables, Expressions and Order of Operations

Created using the ClassTools QR Treasure Hunt Generator

Teacher Notes

A. Prior to the lesson:

1. Arrange students into groups. Each group needs at least ONE person who has a mobile device.

2. If their phone camera doesn't automatically detect and decode QR codes, ask students to

3. Print out the QR codes.

4. Cut them out and place them around your class / school.


B. The lesson:

1. Give each group a clipboard and a piece of paper so they can write down the decoded questions and their answers to them.

2. Explain to the students that the codes are hidden around the school. Each team will get ONE point for each question they correctly decode and copy down onto their sheet, and a further TWO points if they can then provide the correct answer and write this down underneath the question.

3. Away they go! The winner is the first team to return with the most correct answers in the time available. This could be within a lesson, or during a lunchbreak, or even over several days!


C. TIPS / OTHER IDEAS

4. A detailed case study in how to set up a successful QR Scavenger Hunt using this tool can be found here.


Questions / Answers (teacher reference)

Question

Answer

1. At the beginning of the month, Lena had $72 in her checking account. During the month, she made a withdrawal of nineteen dollars and a deposit of seven dollars. Write an expression that can be used to find the balance in her checking account at the end of the month.72 - 19 + 7
2. The expression t/5, where t is the time in seconds between when you see a lightning flash and when you hear the thunder, may be used to estimate the distance, in miles, of a lightning flash. How far away is a lightning flash is 20 seconds elapses between the time you see the lightning and the time you hear the thunder?4 miles
3. Erik gave 176 water balloons to the people who came to a summer party. Each person received 11 balloons. Which equation can be used to find n, the number of people at the party? A) The quotient of n and 11 is eleven. B) A number n decreased by eleven is 176 C) The product of n and eleven is 176 D) 176 equals 11 divided by n. B) The product of n and eleven is 176.
4. A local pizza parlor charges $13.75 for a large cheese pizza. Each additional topping adds $0.65 to the price of the pizza. Write and expression that represents the cost of a large cheese pizza with n additional toppings. 13.75 + 0.65n
5. A worker plants flowers and trees in a park. She plants 4 times as many flowers as trees in one area. In another area, she plants 30 more flowers. If the worker plants t treets, write an expression that represents the number of flowers she plants.4t + 30

 



Variables, Expressions and Order of Operations: QR Challenge

https://www.classtools.net/QR/decode.php?text=Variables, Expressions and Order of Operations
Q1/5:

At the beginning of the month, Lena had $72 in her checking account. During the month, she made a withdrawal of nineteen dollars and a deposit of seven dollars. Write an expression that can be used to find the balance in her checking account at the end of the month.&choe=UTF-8

Question 1 (of 5)

 



Variables, Expressions and Order of Operations: QR Challenge

https://www.classtools.net/QR/decode.php?text=Variables, Expressions and Order of Operations
Q2/5:

The expression t/5, where t is the time in seconds between when you see a lightning flash and when you hear the thunder, may be used to estimate the distance, in miles, of a lightning flash. How far away is a lightning flash is 20 seconds elapses between the time you see the lightning and the time you hear the thunder?&choe=UTF-8

Question 2 (of 5)

 



Variables, Expressions and Order of Operations: QR Challenge

https://www.classtools.net/QR/decode.php?text=Variables, Expressions and Order of Operations
Q3/5:

Erik gave 176 water balloons to the people who came to a summer party. Each person received 11 balloons. Which equation can be used to find n, the number of people at the party? A) The quotient of n and 11 is eleven. B) A number n decreased by eleven is 176 C) The product of n and eleven is 176 D) 176 equals 11 divided by n. &choe=UTF-8

Question 3 (of 5)

 



Variables, Expressions and Order of Operations: QR Challenge

https://www.classtools.net/QR/decode.php?text=Variables, Expressions and Order of Operations
Q4/5:

A local pizza parlor charges $13.75 for a large cheese pizza. Each additional topping adds $0.65 to the price of the pizza. Write and expression that represents the cost of a large cheese pizza with n additional toppings.&choe=UTF-8

Question 4 (of 5)

 



Variables, Expressions and Order of Operations: QR Challenge

https://www.classtools.net/QR/decode.php?text=Variables, Expressions and Order of Operations
Q5/5:

A worker plants flowers and trees in a park. She plants 4 times as many flowers as trees in one area. In another area, she plants 30 more flowers. If the worker plants t treets, write an expression that represents the number of flowers she plants.&choe=UTF-8

Question 5 (of 5)