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QR Challenge: 2 Digit addition and subtraction word 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

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. Mary has 38 marbles. Mark gives her 19 more. How many does she have? answer
2. Jim has 77 pennies. He gives 19 away. How many pennies are left? answer
3. Mrs. Hubbard has $15. She cleans the house and earns $45. How much money does she have now? answer
4. Rachel gave Parker 33 pebbles. He collected 38 more. How many does he have now? answer
5. Kevin had 33 snickers. He ate 17 of them! How many does he have now? answer
6. Michelle had $67. She earned $47 more. How much money does she have? answer

 


2 Digit addition and subtraction word problems: QR Challenge

https://www.classtools.net/QR/decode.php?text=2 Digit addition and subtraction word problems
Q1/6:

Mary has 38 marbles. Mark gives her 19 more. How many does she have? &choe=UTF-8

Question 1 (of 6)

 


2 Digit addition and subtraction word problems: QR Challenge

https://www.classtools.net/QR/decode.php?text=2 Digit addition and subtraction word problems
Q2/6:

Jim has 77 pennies. He gives 19 away. How many pennies are left? &choe=UTF-8

Question 2 (of 6)

 


2 Digit addition and subtraction word problems: QR Challenge

https://www.classtools.net/QR/decode.php?text=2 Digit addition and subtraction word problems
Q3/6:

Mrs. Hubbard has $15. She cleans the house and earns $45. How much money does she have now? &choe=UTF-8

Question 3 (of 6)

 


2 Digit addition and subtraction word problems: QR Challenge

https://www.classtools.net/QR/decode.php?text=2 Digit addition and subtraction word problems
Q4/6:

Rachel gave Parker 33 pebbles. He collected 38 more. How many does he have now? &choe=UTF-8

Question 4 (of 6)

 


2 Digit addition and subtraction word problems: QR Challenge

https://www.classtools.net/QR/decode.php?text=2 Digit addition and subtraction word problems
Q5/6:

Kevin had 33 snickers. He ate 17 of them! How many does he have now? &choe=UTF-8

Question 5 (of 6)

 


2 Digit addition and subtraction word problems: QR Challenge

https://www.classtools.net/QR/decode.php?text=2 Digit addition and subtraction word problems
Q6/6:

Michelle had $67. She earned $47 more. How much money does she have? &choe=UTF-8

Question 6 (of 6)