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QR Challenge: Decimal Madness!

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. Five swimmers are entered into a competition. Four of the swimmers have had their turns. Their scores are 9.8 s, 9.75 s, 9.79 s, and 9.81 s. What score must the last swimmer get in order to win the competition?9.74
2. To make a miniature ice cream truck, you need tires with a diameter between 1.465 cm and 1.472 cm. Will a tire that is 1.4691 cm in diameter work? Explain why or why not.Yes, because 1.4691 is in between 1.465 and 1.472 cm.
3. School lunches cost $14.50 per week. About how much would 15.5 weeks of lunches cost? (Round each to nearest whole then multiply)$240
4. A student earns $11.75 per hour for gardening. If she worked 21 hours this month, then ABOUT how much did she earn? (round first then multiply)252
5. Rick's car gets 29.7 miles per gallon on the highway. If his fuel tank holds 10.45 gallons, ABOUT how far can he travel on one full tank of gas? (round to nearest dollar first then multiply)300 miles
6. Jose is making cookies for his class. He needs 4.2 pounds of chocolate chips, 0.8 pounds of peanut butter chips, and 3.7 pounds of walnuts. Estimate the total amount of pounds of ingredients he needs to make his cookies. (Round then add)9 pounds

 


Decimal Madness!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Five-swimmers-are-entered-into-a-competition.-Four-of-the-swimmers-have-had-their-turns.-Their-scores-are-9.8-s,-9.75-s,-9.79-s,-and-9.81-s.-What-score-must-the-last-swimmer-get-in-order-to-win-the-competition?

Question 1 (of 6)

 


Decimal Madness!: QR Challenge

https://www.classtools.net/QR/decode.php?text=To-make-a-miniature-ice-cream-truck,-you-need-tires-with-a-diameter-between-1.465-cm-and-1.472-cm.-Will-a-tire-that-is-1.4691-cm-in-diameter-work?-Explain-why-or-why-not.

Question 2 (of 6)

 


Decimal Madness!: QR Challenge

https://www.classtools.net/QR/decode.php?text=School-lunches-cost-$14.50-per-week.-About-how-much-would-15.5-weeks-of-lunches-cost?-(Round-each-to-nearest-whole-then-multiply)

Question 3 (of 6)

 


Decimal Madness!: QR Challenge

https://www.classtools.net/QR/decode.php?text=A-student-earns-$11.75-per-hour-for-gardening.-If-she-worked-21-hours-this-month,-then-ABOUT-how-much-did-she-earn?-(round-first-then-multiply)

Question 4 (of 6)

 


Decimal Madness!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rick's-car-gets-29.7-miles-per-gallon-on-the-highway.-If-his-fuel-tank-holds-10.45-gallons,-ABOUT-how-far-can-he-travel-on-one-full-tank-of-gas?-(round-to-nearest-dollar-first-then-multiply)

Question 5 (of 6)

 


Decimal Madness!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Jose-is-making-cookies-for-his-class.-He-needs-4.2-pounds-of-chocolate-chips,-0.8-pounds-of-peanut-butter-chips,-and-3.7-pounds-of-walnuts.-Estimate-the-total-amount-of-pounds-of-ingredients-he-needs-to-make-his-cookies.-(Round-then-add)

Question 6 (of 6)