QR Challenge: Decimal Operations

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. Find the difference of 15-10.12	4.88
2. Find the sum of 7.889+3.8	11.689
3. Solve 417.4 x 8.5	3,547.9
4. Johnny makes $4.75 per hour at his work.If he works 8 hours, how much money will he earn?	$38.00
5. Jim rides the bus to and from school each day. A one-way trip is 8.23 kilometers. How many kilometers does he travel in 3 days?	49.38
6. What is 4.86/0.2?	24.3
7. What is 158.1/5.1?	31
8. After its first day of life, a baby blue whale started growing.It grew 47.075 inches. If the average baby blue whale grows at a rate of 1.5 inches a day, for how many days did the baby whale grow, to the nearest tenth of a day?	31.4
9. Round 59.899 to the nearest whole number(ones place).	60
10. Round 201.0249 to the hundredths place.	201.02
11. Round 0.89 to the tenths place.	.9
12. Round $2.345 to the nearest cent(hundredths place).	$2.35
13. Compare using <,>,=: 23.7 23.6	>
14. Compare using <,>,=: 2.7 2.77	<
15. Compare using <,>,=: .6 .60	=
16. Order the numbers from least to greatest:0.8,0.91,0.88,0.98,0.9	.8,.88,.9,.91,.98
17. Order the numbers from least to greatest:2.4,2.06,2.47,2.3,2.8	2.06,2.3,2.4,2.47,2.8

 

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