QR Challenge: Addition and Subtraction Story Problems

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

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.

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. Isaac bought 15 cartons of ice cream and 2 cartons of yogurt. Each carton of ice cream cost $3 and each carton of yogurt cost $1. How much more did Isaac spend on ice cream than on yogurt?	$43
2.
3.
4. Nancy had 69 pieces of candy. She gave 4 pieces each to 8 friends. How many pieces of candy does Nancy have left?	37
5.
6. There are 55 students in the orchestra and twice that number in the band. There are 20 boys and 28 girls in the choir. If each student only participates in one group, how many students total are there in the orchestra, the band, and the choir?	213
7.
8. Dina always takes the same route when she walks her dog. First, she walks 8 blocks to the park. Then she walks 8 blocks to the elementary school. Finally, she walks 4 blocks to get back home. Dina walks her dog 4 times each day. How many blocks does Dina's dog walk each day?	80
9.
10.
11. Luke had 24 stickers. He bought 13 stickers from a store in the mall and got 29 stickers for his birthday. Then Luke gave 10 of the stickers to his sister and used 12 to decorate a greeting card. How many stickers does Luke have left?	44

Addition and Subtraction Story Problems: QR Challenge

https://www.classtools.net/QR/decode.php?text=Isaac-bought-15-cartons-of-ice-cream-and-2-cartons-of-yogurt.-Each-carton-of-ice-cream-cost-$3-and-each-carton-of-yogurt-cost-$1.-How-much-more-did-Isaac-spend-on-ice-cream-than-on-yogurt?

Question 1 (of 11)