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## 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.

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.

### Answer

1. What is 2.45 x 1.2?2.94
2. What is 18.1 x 2.4?43.44
3. What is 0.46 x 3.8?1.748
4. What is 0.0035 x 0.27?0.000945
5. What is 0.078 x 0.034?0.002652
6. What is 0.123 x 1/4?0.03075
7. What is 318 - 2.45?315.55
8. What is 48.17 - 2.56?45.61
9. What is 3.5 + 35 + 0.35?38.85
10. What is 189 + 13.5?202.5
11. What is 20.6 + 1.45?22.05
12. What is 0.57 + 87?87.57
13. What is 8.35 divided by 0.4?20.875
14. What is 7.21 divided by 5?1.442
15. What is 5 divided by 6?0.8333…
16. What is 5 divided by 8?0.625
17. What is 4 divided by 0.08?50
18. What is 7 divided by 11?0.636363…
19. What is 19 divided by 11?1.727272…
20. For every 3 cats at an animal shelter, there are 7 dogs. If there are 21 dogs, how many cats are there?9 cats
21. For every 4 students that attended the football game, there were 7 adults. If there were 280 adults, how many students were there?160 students
22. The donut shop sells 8 regular glazed donuts for every 5 chocolate glazed. If they sell 160 chocolate glazed, how many regular glazed did they sell?256 regular glazed donuts
23. For every 2 students in a class, a local business agreed to donate 3 boxes of tissues. If they donated 42 boxes of tissues to Mikayla’s class, how many students are there in her class?28 students
24. A train is traveling at a rate of 140 miles every 2 hours. At this speed, how long will it take the train to travel 2,800 miles?40 hours
25. An airplane company allows 50 lbs of luggage weight per passenger. If a Boeing 747 plane can hold 416 passengers, and every passenger brings the maximum weight of luggage allowed, how much would all their luggage weigh?20,800 lbs
26. CHALLENGE: For each person that likes Pepsi best, there are 3 who prefer Coke. In a class of 20 people, how many will prefer Pepsi?5 people will prefer Pepsi
27. CHALLENGE: When making the Harry Potter movies, the creators used a scale of 2:3 in scenes featuring Hagrid (average man's height to Hagrid's height). If the average bed is 6 and 1/2 feet long, how long should Hagrid's bed be?9 ¾ feet long

### Decimals Review QR Code Hunt: QR Challenge

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