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QR Challenge: Decimals That Multiply!

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. The product of 8.21 and 6 is ____.49.26
2. 34 hundredths x 8 = _____2.72
3. 6 x 0.71 = ____4.26
4. 0.9 x 12 = _____10.8
5. What is the closest estimate for the product of 7.29 and 3?21
6. Joe bought 3 storybooks. Each book costs $4.65. How much did he pay altogether?$13.95
7. 56.08 x 9 = _____504.72
8. 0.08 x 2 = ____0.16
9. The value of 6.03 x 4 is _____.24.12
10. Mary went to the store. She bought 3 shirts that cost $7.94 each. She also bought 2 pants that cost $9.94 each. How much did she pay altogether for the clothes? If she gave the cashier $50, how much change did she receive?$43.72;$6.28
11. A rectangular room measures 34.6 yd by 9 yd. If the cost of carpet is $8 a square yard, how much would it cost to carpet the room?$2491.20
12. At the store, Sam bought 2 bags of peanuts for $2.56 each and 4 Milky Way bars for $.98 each. How much did Sam spend at the store?$9.04
13. The closest estimate of 14.87 and 6 is _____.60
14. 34.75 x 3 = _____104.25
15. 0.08 x 11 = _____0.88
16. 0.7 x 11 = _____7.7
17. 10 x 0.05= ____0.5
18. At practice, Kim ran 2.3 km. If Janice ran 7 times farther than Kim, how far did Janice run at practice?16.1 km
19. 8.91 x 7 = ____62.37
20. Solve. (1.2 + 4.5) x 9 = _____51.3
21. Solve. 8 x 2.3 + 10.6 = _____29
22. 8 ones and 9 hundredths - 54 hundredths = _____7.55
23. 7 tenths 5 ones 3 hundredths + 8 ones 2 hundredths =_____13.75
24. Adam saved $0.85 each day for 6 days. If he gave his sister $1.25, how much money did he have left?$3.85

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=The_product_of_8.21_and_6_is_____.

Question 1 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=34_hundredths_x_8_=______

Question 2 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=6_x_0.71_=_____

Question 3 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=0.9_x_12_=______

Question 4 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_closest_estimate_for_the_product_of_7.29_and_3?

Question 5 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Joe_bought_3_storybooks._Each_book_costs_$4.65._How_much_did_he_pay_altogether?

Question 6 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=56.08_x_9_=______

Question 7 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=0.08_x_2_=_____

Question 8 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=The_value_of_6.03_x_4_is______.

Question 9 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Mary_went_to_the_store._She_bought_3_shirts_that_cost_$7.94_each._She_also_bought_2_pants_that_cost_$9.94_each._How_much_did_she_pay_altogether_for_the_clothes?_If_she_gave_the_cashier_$50,_how_much_change_did_she_receive?

Question 10 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=A_rectangular_room_measures_34.6_yd_by_9_yd._If_the_cost_of_carpet_is_$8_a_square_yard,_how_much_would_it_cost_to_carpet_the_room?

Question 11 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=At_the_store,_Sam_bought_2_bags_of_peanuts_for_$2.56_each_and_4_Milky_Way_bars_for_$.98_each._How_much_did_Sam_spend_at_the_store?

Question 12 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=The_closest_estimate_of_14.87_and_6_is______.

Question 13 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=34.75_x_3_=______

Question 14 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=0.08_x_11_=______

Question 15 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=0.7_x_11_=______

Question 16 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=10_x_0.05=_____

Question 17 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=At_practice,_Kim_ran_2.3_km._If_Janice_ran_7_times_farther_than_Kim,_how_far_did_Janice_run_at_practice?

Question 18 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=8.91_x_7_=_____

Question 19 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Solve._(1.2_+_4.5)_x_9_=______

Question 20 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Solve._8_x_2.3_+_10.6_=______

Question 21 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=8_ones_and_9_hundredths_-_54_hundredths_=______

Question 22 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=7_tenths_5_ones_3_hundredths_+_8_ones_2_hundredths_=_____

Question 23 (of 24)

 


Decimals That Multiply!: QR Challenge

https://www.classtools.net/QR/decode.php?text=Adam_saved_$0.85_each_day_for_6_days._If_he_gave_his_sister_$1.25,_how_much_money_did_he_have_left?

Question 24 (of 24)