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QR Challenge: Adding/Subtracting Multi-digit numbers

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. What is 234 + 567?801
2. What is 1,865 - 397?1,468
3. Billy has 142 rocks in his collection. Bobby has 98 rocks. How many more rocks does Billy have than Bobby?44 rocks
4. What is 549 - 284?265
5. What is the NUMBER MODEL for the following problem? Joey needs to get 35 cantaloupes for the Mothers' Day brunch. He bought 17 at one store. How many more does he need to buy?35-17=18
6. What is 12,609 + 4,875?17,484
7. What is 638 - 621?17
8. If Carrie drives 104 miles and Janet drives 209 miles, how many miles did they drive in all?313 miles

 


Adding/Subtracting Multi-digit numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_234_+_567?

Question 1 (of 8)

 


Adding/Subtracting Multi-digit numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_1,865_-_397?

Question 2 (of 8)

 


Adding/Subtracting Multi-digit numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=Billy_has_142_rocks_in_his_collection._Bobby_has_98_rocks._How_many_more_rocks_does_Billy_have_than_Bobby?

Question 3 (of 8)

 


Adding/Subtracting Multi-digit numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_549_-_284?

Question 4 (of 8)

 


Adding/Subtracting Multi-digit numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_NUMBER_MODEL_for_the_following_problem?_Joey_needs_to_get_35_cantaloupes_for_the_Mothers'_Day_brunch._He_bought_17_at_one_store._How_many_more_does_he_need_to_buy?

Question 5 (of 8)

 


Adding/Subtracting Multi-digit numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_12,609_+_4,875?

Question 6 (of 8)

 


Adding/Subtracting Multi-digit numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_638_-_621?

Question 7 (of 8)

 


Adding/Subtracting Multi-digit numbers: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_Carrie_drives_104_miles_and_Janet_drives_209_miles,_how_many_miles_did_they_drive_in_all?

Question 8 (of 8)