QR Challenge: Properties of Multiplication
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. 19 × (3 × 17) = (19 × 3) × 17 | associative property
|
2. 27 × 131 = 131 × 27 | commutative property
| 3. (3 × 13) × 0 = 0 | zero property
| 4. 3 × (92 × 1) = 3 × 92 | identity property
| 5. 9 × (13 × 0) = 9 × 0 = 0 | zero property
| 6. (18 × 62) × 31= (62 × 18) × 31 | commutative
| 7. (0 × 18) × 96 = 0 | zero property
| 8. 1 × 0 = 0 | zero property
| 9. 13 × 76 = 76 × 13 | commutative property
| 10. 0 × (56 × 27) = 0 | zero property
| 11. (17 × 12) × 1 = (17 × 12) | identity
| 12. (0 × 7) × 18 = 0 | zero property
| 13. (2 × 52) × 20 = 2 × (52 × 20) | associative property
| 14. (3 × 9) × 14 = 14 × (3 × 9) | commutative property
| 15. (0 × 9) × 11 = 0 | zero property
| 16. 1 × (7 × 16) = 7 × 16 | identity property |
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=19_×_(3_×_17)_=_(19_×_3)_×_17
Question 1 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=27_×_131_=_131_×_27
Question 2 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=(3_×_13)_×_0_=_0
Question 3 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=3_×_(92_×_1)_=_3_×_92
Question 4 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=9_×_(13_×_0)_=_9_×_0_=_0
Question 5 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=(18_×_62)_×_31=_(62_×_18)_×_31
Question 6 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=(0_×_18)_×_96_=_0
Question 7 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=1_×_0_=_0
Question 8 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=13_×_76_=_76_×_13
Question 9 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=0_×_(56_×_27)_=_0
Question 10 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=(17_×_12)_×_1_=_(17_×_12)
Question 11 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=(0_×_7)_×_18_=_0
Question 12 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=(2_×_52)_×_20_=_2_×_(52_×_20)
Question 13 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=(3_×_9)_×_14_=_14_×_(3_×_9)
Question 14 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=(0_×_9)_×_11_=_0
Question 15 (of 16)
Properties of Multiplication: QR Challenge
https://www.classtools.net/QR/decode.php?text=1_×_(7_×_16)_=_7_×_16
Question 16 (of 16)
