 # QR Challenge: Can I multiply decimals by 10, 100 and 1000?

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### Create a New Quiz | Edit this quiz # 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

• 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.

### Questions / Answers (teacher reference)

 Question Answer 0.2 x 10 2 2.1 x 10 21 3.4 x 10 34 3.4 x 100 340 2.1 x 100 210 0.2 x 100 20 0.62 x 1000 620 0.04 x 100 4 3.62 x 10 36.2 13.04 x 100 1304 42.62 x 100 4262.5 47.03 x 10 470.36 0.248 x 1000 248 0.29 x 10 2.9 2.629 x 100 262.9 142 x 10 1427.8 78.146 x 100 7814.6 7.693 x 1000 7693 2.4 x 10 240 3.62 x 100 0.362 7.692 x 1000 76.92 ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 1 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 2 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 3 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 4 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 5 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 6 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 7 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 8 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 9 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 10 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 11 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 12 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 13 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 14 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 15 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 16 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 17 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 18 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 19 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 20 (of 21) ### Can I multiply decimals by 10, 100 and 1000?: QR Challenge Question 21 (of 21)