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QR Challenge: Subtraction

Created using the ClassTools QR Treasure Hunt Generator

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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. Write the fact family for the numbers 6, 5, and 11.6+5=11
2. Write the fact family for the numbers 3, 6, and 9.3+6=9
3. Write the fact family for the numbers 11, 7, and 1811+7=18
4. Which part of the fact family is missing? 6+8=14, 8+6=14, 14-8=614-6=8
5. Which part of the fact family is missing? 5+4=9, 9-4=5, 9-5=44+5=9
6. There are 8 spiders on a web. 3 crawl away. Write the subtraction sentence to show how many are left.8-3=5
7. Abby\'s dad wrote this addition sentence on a piece of paper. Write a related subtraction sentence. 5+7=12 12-5=7

 


Subtraction: QR Challenge

https://www.classtools.net/QR/decode.php?text=Subtraction
Q1/7:

Write the fact family for the numbers 6, 5, and 11.&choe=UTF-8

Question 1 (of 7)

 


Subtraction: QR Challenge

https://www.classtools.net/QR/decode.php?text=Subtraction
Q2/7:

Write the fact family for the numbers 3, 6, and 9.&choe=UTF-8

Question 2 (of 7)

 


Subtraction: QR Challenge

https://www.classtools.net/QR/decode.php?text=Subtraction
Q3/7:

Write the fact family for the numbers 11, 7, and 18&choe=UTF-8

Question 3 (of 7)

 


Subtraction: QR Challenge

https://www.classtools.net/QR/decode.php?text=Subtraction
Q4/7:

Which part of the fact family is missing? 6+8=14, 8+6=14, 14-8=6&choe=UTF-8

Question 4 (of 7)

 


Subtraction: QR Challenge

https://www.classtools.net/QR/decode.php?text=Subtraction
Q5/7:

Which part of the fact family is missing? 5+4=9, 9-4=5, 9-5=4&choe=UTF-8

Question 5 (of 7)

 


Subtraction: QR Challenge

https://www.classtools.net/QR/decode.php?text=Subtraction
Q6/7:

There are 8 spiders on a web. 3 crawl away. Write the subtraction sentence to show how many are left.&choe=UTF-8

Question 6 (of 7)

 


Subtraction: QR Challenge

https://www.classtools.net/QR/decode.php?text=Subtraction
Q7/7:

Abby\'s dad wrote this addition sentence on a piece of paper. Write a related subtraction sentence. 5+7=12&choe=UTF-8

Question 7 (of 7)