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QR Challenge: Rounding and Estimating

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

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. 1. Round to the nearest ten: 465470
2. 2. Round to the nearest hundred: 688700
3. 3. Round to the nearest ten: 893890
4. 4. Round to the nearest hundred: 935900
5. 5. Devyn has 245 drawings. Round to the nearest hundred.200
6. 6. Jordan watched TV for 345 minutes. Round to the nearest ten. 350
7. 7. Estimate your answer. Remember to round to the nearest ten first and then find your answer. 23+35=20+40=60
8. 8. Estimate your answer. Remember to round to the nearest ten first and then find your answer. 79-41=80-40=40
9. 9. Estimate your answer. Remember to round to the nearest ten first and then find your answer. 29+69=30+70=100
10. 10. Estimate your answer. Remember to round to the nearest ten first and then find your answer. 24-14=20-10=10
11. 11. Estimate your answer. Remember to round to the nearest hundred first and then find your answer. 514-195=500-200=300
12. 12. Estimate your answer. Remember to round to the nearest hundred first and then find your answer. 556+552=600+600=1200
13. 13. Estimate your answer. Remember to round to the nearest hundred first and then find your answer. 295+933=300+900=1200
14. 14. Estimate your answer. Remember to round to the nearest hundred first and then find your answer. 617-334=600-300=300
15. 15. Estimate your answer. Remember to round to the nearest hundred first and then find your answer. 929-247=900-200=700

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q1/15:

1. Round to the nearest ten: 465&choe=UTF-8

Question 1 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q2/15:

2. Round to the nearest hundred: 688&choe=UTF-8

Question 2 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q3/15:

3. Round to the nearest ten: 893&choe=UTF-8

Question 3 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q4/15:

4. Round to the nearest hundred: 935&choe=UTF-8

Question 4 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q5/15:

5. Devyn has 245 drawings. Round to the nearest hundred.&choe=UTF-8

Question 5 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q6/15:

6. Jordan watched TV for 345 minutes. Round to the nearest ten. &choe=UTF-8

Question 6 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q7/15:

7. Estimate your answer. Remember to round to the nearest ten first and then find your answer. 23+35=&choe=UTF-8

Question 7 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q8/15:

8. Estimate your answer. Remember to round to the nearest ten first and then find your answer. 79-41=&choe=UTF-8

Question 8 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q9/15:

9. Estimate your answer. Remember to round to the nearest ten first and then find your answer. 29+69=&choe=UTF-8

Question 9 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q10/15:

10. Estimate your answer. Remember to round to the nearest ten first and then find your answer. 24-14=&choe=UTF-8

Question 10 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q11/15:

11. Estimate your answer. Remember to round to the nearest hundred first and then find your answer. 514-195=&choe=UTF-8

Question 11 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q12/15:

12. Estimate your answer. Remember to round to the nearest hundred first and then find your answer. 556+552=&choe=UTF-8

Question 12 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q13/15:

13. Estimate your answer. Remember to round to the nearest hundred first and then find your answer. 295+933=&choe=UTF-8

Question 13 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q14/15:

14. Estimate your answer. Remember to round to the nearest hundred first and then find your answer. 617-334=&choe=UTF-8

Question 14 (of 15)

 



Rounding and Estimating: QR Challenge

https://www.classtools.net/QR/decode.php?text=Rounding and Estimating
Q15/15:

15. Estimate your answer. Remember to round to the nearest hundred first and then find your answer. 929-247=&choe=UTF-8

Question 15 (of 15)