QR Challenge: Pre-Algebra Builder #17

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. Add -2 + (-31)	-33
2. What is (-15)(-5)?	75
3. What is -3 - (-12)?	9
4. What is 11 + (-20)?	-9
5. What is 14 - 8?	6
6. What is (-10)(-5)(-2)?	-100
7. What is (-222)(0.5)?	-111
8. What is 8-11?	-3
9. What is -8 + 5?	-3
10. Write 0.000034 in scientific notation.	3.4 x 10^-5
11. Write 654,000,000 in scientific notation.	6.54 x 10^8
12. Write 7.01 x 10^7 in standard form.	70,100,000
13. Place the following numbers on a number line: square root of 13, absolute value of -1.3, -1, -3.75, 75%	see teacher
14. Add 6/7 + 2 3/4	3 17/28
15. Subtract 5 2/7 - 4 5/9	46/63
16. Evaluate if g=2, h=3, and k=-1 for k^3 - h - g	-6
17. Evaluate if g=2, h=3, and k=-1 for 10-gh^2k	28
18. The name for the square root symbol is called what?	radical sign
19. What is 8^3 called?	power
20. In the power 9^4, the 9 is called what?	the base
21. Pi is categorized as what kind of number?	irrational
22. Write 0.125 as a percent and as a fraction.	1/8
23. Write 2/3 as a decimal and a percent.	.6 and 66.6%
24. Write 0.375 as a percent and a fraction.	37.5% and 3/8
25. Write 5/8 as a percent and a decimal.	62.5% and 0.625
26. Write 1/3 as a decimal and a percent.	.3 and 33.3%
27. Write 0.2 as a fraction and a percent.	1/5 and 20%
28. Write 7/8 as a decimal and a percent.	0.875 and 87.5%
29. Write 3/4 as a decimal and a percent.	0.75 and 75%
30. Write 0.4 as a fraction and a percent	2/5 and 40%
31. Write 0.5 as a fraction and a percent.	1/2 and 50%

 

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