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QR Challenge: Adding/Subtracting positive and negative numbers

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. Question1 -7 + 8 answer 1
2. Question2 64 + (-8) answer2 56
3. Question3 -6 + (-11) answer3 -17
4. Question4 -36 - (-4) answer4 -32
5. Question5 50 - (-10) answer5 60
6. Question6 -88 - (-11) answer6 77
7. Question7 -64 + 22 answer7 42
8. Question8 40 - (-40) answer8 0
9. Question9 -9 - (-80) answer9 71
10. Question10 -34 + 40answer10 6
11. Question11 -101 - 38answer11 -63
12. Question12 7 + (-14)answer12 -7
13. Question13 15 - 89 answer13 -74
14. Question14 -24 + 5 answer14 -19
15. Question15 18 - 7 answer15 11
16. Question16 -6 + (-6) ansswer16 -12
17. Question17 587 - 890 answer17 -303
18. Question18 -12 + (-12) answer18 -24
19. Question19 0 - 9 answer19 -9
20. Question20 -70 - (-65) answer20 -15
21. Question21 15- (-25) answer21 35
22. Question22 -2 - (-7) answer22 5
23. Question23 105 + (-7) answer23 98
24. Question24 50 + 4 answer24 54
25. Question25 -830 + 450 answer25 -683
26. Question26 -23 - 3 answer26 -20
27. Question27 -3 + (-8) answer27 -11
28. Question28 -6 + 18 answer28 12
29. Question29 -7 - (-70) answer29 63
30. Question30 603 + -50 answer30 553
31. BonusQuestion1 -4 + (-20) - 9 + (-11) answerbonus1 -44
32. BonusQuestion2 -731 + (-500)- (-200) + (-444) answerbonus2 -1475

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question1--7-+-8

Question 1 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question2--64-+-(-8)

Question 2 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question3--6-+-(-11)

Question 3 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question4---36---(-4)

Question 4 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question5--50---(-10)

Question 5 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question6---88---(-11)

Question 6 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question7---64-+-22

Question 7 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question8--40---(-40)

Question 8 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question9---9---(-80)

Question 9 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question10---34-+-40

Question 10 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question11--101---38

Question 11 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question12--7-+-(-14)

Question 12 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question13--15---89

Question 13 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question14---24-+-5

Question 14 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question15--18---7

Question 15 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question16---6-+-(-6)

Question 16 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question17--587---890

Question 17 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question18---12-+-(-12)

Question 18 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question19--0---9

Question 19 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question20---70---(-65)

Question 20 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question21--15--(-25)

Question 21 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question22---2---(-7)

Question 22 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question23--105-+-(-7)

Question 23 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question24--50-+-4

Question 24 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question25---830-+-450

Question 25 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question26---23---3

Question 26 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question27---3-+-(-8)

Question 27 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question28---6-+-18

Question 28 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question29---7---(-70)

Question 29 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Question30--603-+--50

Question 30 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=BonusQuestion1--4-+-(-20)---9-+-(-11)

Question 31 (of 32)

 


Adding/Subtracting positive and negative numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=BonusQuestion2--731-+-(-500)--(-200)-+-(-444)

Question 32 (of 32)