# Print

## 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

• Bring these devices into the lesson.

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.

### Question

1. 5/6 - (-4/6) = 1-1/2
2. -11/12 + 7/12 = -1/3
3. 12-5/9 + (-1-1/9) = 11-4/9
4. -8-3/10 - 4- 9/10 = -13-1/5
5. 2-12/13 - (-7-10/13) = 10-9/13
6. -1/5 - 4/5 = -1
7. -7/20 - 7/20 = -7/10
8. Evaluate this expression if x = -5/9, y = 2/9, and z = -4/9: y - z 2/3
9. Evaluate this expression if x = -5/9, y = 2/9, and z = -4/9: y - x 7/9
10. Evaluate this expression if x = -5/9, y = 2/9, and z = -4/9: x - z -1/9
11. Evaluate this expression if x = -5/9, y = 2/9, and z = -4/9: z- x 1/9
12. Nan was 59-7/8 inches tall at the end of the summer. She was 62-1/8 inches by March. How much did she grow during that time? 2-1/4 inches
13. Yahto needs 3-3/4 cups of sugar to make cookies. He needs an additional 3/4 cup for bread. Find the total amount of sugar that Yahto needs. 4-1/2 cups
14. -2-9/10 + (-9-9/10) + (-6-9/10) = -19-7/10
15. 1/9 - 2-4/9-5/9 = -2-8/9
16. A triathlon is a race with swimming, biking, and running. If an athlete swims for 18-2/4 minutes, bikes for 59-1/4 minutes, and runs for 37-3/4 minutes, what is his total time? 115-1/2 minutes
17. A lasagna recipe uses 1-2/4 teaspoons of basil, 1/4 teaspoon pepper, and 4 teaspoons parsley. If you double the recipe, how many teaspoons of seasoning will you use? 11-1/2 teaspoons
18. Write a subtraction problem with a difference -2/3. Answers will vary.
19. Lopez Construction is replacing a window in a house. The window is currently 3 feet wide by 4 feet tall. The homeowner wants to add 9 inches to each side of the window. What is the new perimeter of the window in feet? Explain your reasoning. 17 feet

### Adding & Subracting Like Fractions: QR Challenge

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### Adding & Subracting Like Fractions: QR Challenge

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