QR Challenge: Solving One-step equations by addition and subtraction
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. x+83=46 | -37
|
2. 72+a=134 | 62
| 3. -152=x-53 | 99
| 4. 90=v-(-49) | 41
| 5. k-43=-42 | 1
| 6. x+(-74)=-94 | -20
| 7. 147=65+r | 82
| 8. 79=-19-b | -98
| 9. -27+p=-105 | -78
| 10. 46+b=-33 | -79
| 11. -147=m-90 | -57
| 12. 12=n-28 | 40
| 13. -24=n-(-34) | -58
| 14. -93+v=-69 | 24
| 15. -56=x-100 | 44
| 16. -2+k=-18 | -16
| 17. 17=a+(-64) | 81
| 18. (2((-2)+5)-(-6))÷4 | 3
| 19. 3((-4)+(-2)-(1-10)) | -9
| 20. 4(-10)-((-1)+7) | -46
| 21. -24÷((-5)-1+7-(-2)) | -8
| 22. (-1(5(-2(10))))+(-8) | 92
| 23. (-3)-(2-(5-4(-6))) | 24
| 24. 10+4+(-8)-(-8)-9 | 5
| 25. (5(-11)-(-7))÷((-4)-2) | 8 |
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=x+83=46
Question 1 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=72+a=134
Question 2 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=-152=x-53
Question 3 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=90=v-(-49)
Question 4 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=k-43=-42
Question 5 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=x+(-74)=-94
Question 6 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=147=65+r
Question 7 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=79=-19-b
Question 8 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=-27+p=-105
Question 9 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=46+b=-33
Question 10 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=-147=m-90
Question 11 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=12=n-28
Question 12 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=-24=n-(-34)
Question 13 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=-93+v=-69
Question 14 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=-56=x-100
Question 15 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=-2+k=-18
Question 16 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=17=a+(-64)
Question 17 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=(2((-2)+5)-(-6))÷4
Question 18 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=3((-4)+(-2)-(1-10))
Question 19 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=4(-10)-((-1)+7)
Question 20 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=-24÷((-5)-1+7-(-2))
Question 21 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=(-1(5(-2(10))))+(-8)
Question 22 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=(-3)-(2-(5-4(-6)))
Question 23 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=10+4+(-8)-(-8)-9
Question 24 (of 25)
Solving One-step equations by addition and subtraction: QR Challenge
https://www.classtools.net/QR/decode.php?text=(5(-11)-(-7))÷((-4)-2)
Question 25 (of 25)