QR Challenge: Compute with multi digit numbers
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
- Download a QR reader (e.g. I-Nigma | NeoReader | Kaywa) onto their mobile devices
- Bring these devices into the lesson.
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. 3.1+5 | 8.1
|
2. 3.1-2 | 1.1
| 3. 39.2+.8 | 40
| 4. 40-39.2 | 1.8
| 5. 25.5+.5 | 26
| 6. 31.6-32.8 | .2
| 7. 7.4+16.3 | 23.7
| 8. 9.5+.5 | 10
| 9. 10-.5 | 9.5
| 10. 3.5-3.4 | .1
| 11. Estimate1.22x2.11 | 2
| 12. Estimate12.1x12.1 | 144
| 13. Estimate7.43x2.43 | 6
| 14. Estimate3.62x4.3 | 16
| 15. Estimate7.62x4.9 | 23
| 16. 5.3x2 | 10.6
| 17. 2x1.6 | 3.2
| 18. 7.32x6 | 43.92
| 19. 22x.3 | 6.6
| 20. 1.48x6.3 | 93.24
| 21. Estimate 2.1x5 | 10.5
| 22. Estimate 4.2x7 | 29.4
| 23. Estimate 3.3x6 | 19.8
| 24. 2.6x8 | 20.8
| 25. 1.3x7 | 9.1
| 26. 3.4x4 | 13.4
| 27. 1.5x9 | 13.9
| 28. 4.1x6 | 24.6
| 29. 3.3x8 | 26.4
| 30. 4.6x9 | 41.4 |
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=3.1+5
Question 1 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=3.1-2
Question 2 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=39.2+.8
Question 3 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=40-39.2
Question 4 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=25.5+.5
Question 5 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=31.6-32.8
Question 6 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=7.4+16.3
Question 7 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=9.5+.5
Question 8 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=10-.5
Question 9 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=3.5-3.4
Question 10 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=Estimate1.22x2.11
Question 11 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=Estimate12.1x12.1
Question 12 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=Estimate7.43x2.43
Question 13 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=Estimate3.62x4.3
Question 14 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=Estimate7.62x4.9
Question 15 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=5.3x2
Question 16 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=2x1.6
Question 17 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=7.32x6
Question 18 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=22x.3
Question 19 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=1.48x6.3
Question 20 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=Estimate_2.1x5
Question 21 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=Estimate_4.2x7
Question 22 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=Estimate_3.3x6
Question 23 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=2.6x8
Question 24 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=1.3x7
Question 25 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=3.4x4
Question 26 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=1.5x9
Question 27 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=4.1x6
Question 28 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=3.3x8
Question 29 (of 30)
Compute with multi digit numbers: QR Challenge
https://www.classtools.net/QR/decode.php?text=4.6x9
Question 30 (of 30)