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QR Challenge: Can I multiply decimals by 10, 100 and 1000?

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. 0.2 x 102
2. 2.1 x 1021
3. 3.4 x 1034
4. 3.4 x 100340
5. 2.1 x 100210
6. 0.2 x 10020
7. 0.62 x 1000620
8. 0.04 x 1004
9. 3.62 x 1036.2
10. 13.04 x 1001304
11. 42.62 x 1004262.5
12. 47.03 x 10470.36
13. 0.248 x 1000248
14. 0.29 x 102.9
15. 2.629 x 100262.9
16. 142 x 101427.8
17. 78.146 x 1007814.6
18. 7.693 x 10007693
19. 2.4 x 10240
20. 3.62 x 1000.362
21. 7.692 x 100076.92

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=0.2-x-10

Question 1 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=2.1-x-10

Question 2 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=3.4-x-10

Question 3 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=3.4-x-100

Question 4 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=2.1-x-100

Question 5 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=0.2-x-100

Question 6 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=0.62-x-1000

Question 7 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=0.04-x-100

Question 8 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=3.62-x-10

Question 9 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=13.04-x-100

Question 10 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=42.62-x-100

Question 11 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=47.03-x-10

Question 12 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=0.248-x-1000

Question 13 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=0.29-x-10

Question 14 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=2.629-x-100

Question 15 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=142-x-10

Question 16 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=78.146-x-100

Question 17 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=7.693-x-1000

Question 18 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=2.4-x-10

Question 19 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=3.62-x-100

Question 20 (of 21)

 


Can I multiply decimals by 10, 100 and 1000?: QR Challenge

https://www.classtools.net/QR/decode.php?text=7.692-x-1000

Question 21 (of 21)