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QR Challenge: Addition Subtraction Tasks

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. Sam subtracted 31,112-502 and said the difference was 22,754. Laura did the same problem and said the difference was 22,744. Who is correct? 31,112-502=?1
2. Sam added 21,678 and 1,076 for a sum of 22,754. Laura added the same numbers and got 22,744. Who is correct? 21,678 + 1,076 = ?2
3. What is the missing number in this problem? + 32,307 = 47,563 Explain how you know.3
4. What is the missing number in this problem? 11,378 +_____+ 9,307 =30,703 Explain how you know.4
5. What is the missing number in this problem? ____- 29,307 = 41,363 Explain how you know.5
6. What is the missing number in this problem? 69,702 -_____ = 57,063 Explain how you know.6

 



Addition Subtraction Tasks: QR Challenge

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Question 1 (of 6)

 



Addition Subtraction Tasks: QR Challenge

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Addition Subtraction Tasks: QR Challenge

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Addition Subtraction Tasks: QR Challenge

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Addition Subtraction Tasks: QR Challenge

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Addition Subtraction Tasks: QR Challenge

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