QR Challenge: Rounding Large Numbers

Created using the ClassTools QR Treasure Hunt Generator

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.

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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!

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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.

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Questions / Answers (teacher reference)

Question	Answer
1. Round 34 568 to the nearest thousand	35 000
2. Round 27 848 to the nearest hundred	27 800
3. Round 85 981 to the nearest hundred	86 000
4. Round 8 449 to the nearest ten	8 450
5. Round 19 432 to the nearest hundred	19 400
6. Round 49 599 to the nearest thousand	50 000
7. Round 962 to the nearest hundred	1 000
8. Round 87 281 to the nearest hundred	87 300
9. Round 38 274 to the nearest thousand	38 000
10. Round 49 919 to the nearest hundred	49 900
11. Round 40 050 to the nearest hundred	40 100
12. Round 67 404 to the nearest thousand	67 000
13. Round 32 874 to the nearest ten	32 870
14. Round 512 to the nearest hundred	500
15. Round 99 999 to the nearest ten	100 000
16. Round 53 545 to the nearest hundred	53 500
17. Round 12 128 to the nearest hundred	12 100
18. Round 65 488 to the nearest thousand	65 000
19. Round 78 246 to the nearest hundred	78 200
20. Round 43 543 to the nearest thousand	44 000

 

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