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QR Challenge: Estimating Sums and Differences with Decimals

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. 7.1 + 5.613
2. 23.5 + 5.630
3. 33.3 - 10.423
4. 123.2 + 10.4133
5. 73.7 - 20.254
6. 63.6 + 15.680
7. 32.6 + 20.453
8. 86.1 - 40.645
9. 353.6 + 100.4454
10. 99.3 - 63.633
11. Keep Looking!1
12. Aw, you didn't get this one!!2
13. Getting warmer!!!3
14. Ha ha, not here!4
15. Keep trying!!5
16. You're not too good at this, are you?6

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q1/16:

7.1 + 5.6&choe=UTF-8

Question 1 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q2/16:

23.5 + 5.6&choe=UTF-8

Question 2 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q3/16:

33.3 - 10.4&choe=UTF-8

Question 3 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q4/16:

123.2 + 10.4&choe=UTF-8

Question 4 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q5/16:

73.7 - 20.2&choe=UTF-8

Question 5 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q6/16:

63.6 + 15.6&choe=UTF-8

Question 6 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q7/16:

32.6 + 20.4&choe=UTF-8

Question 7 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q8/16:

86.1 - 40.6&choe=UTF-8

Question 8 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q9/16:

353.6 + 100.4&choe=UTF-8

Question 9 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q10/16:

99.3 - 63.6&choe=UTF-8

Question 10 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q11/16:

Keep Looking!&choe=UTF-8

Question 11 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q12/16:

Aw, you didn't get this one!!&choe=UTF-8

Question 12 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q13/16:

Getting warmer!!!&choe=UTF-8

Question 13 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q14/16:

Ha ha, not here!&choe=UTF-8

Question 14 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q15/16:

Keep trying!!&choe=UTF-8

Question 15 (of 16)

 


Estimating Sums and Differences with Decimals: QR Challenge

https://www.classtools.net/QR/decode.php?text=Estimating Sums and Differences with Decimals
Q16/16:

You're not too good at this, are you?&choe=UTF-8

Question 16 (of 16)