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QR Challenge: QR Code Hunt Addition & Subtraction Aut1

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. 1. 3541 + 2796 =6337
2. 2. 8643 - 1378 =7265
3. 3. Round this calculation to the nearest 100 to estimate the answer: 324 + 587300+600=900
4. 432 + _____ = 770770 – 432 = 338
5. 5. 999 + 9991998
6. 782 – 435 = 353Taken the 2 from the 5: 347
7. 7. Ellis has 578 stamps. Ashleigh has 456 stamps. How many stamps do they have altogether?578 + 456 = 1034
8. 8. Check the answer using the inverse: 762 + 345 = 11071107 – 762 = 345
9. 9. Miss K estimates the answer to 3568 + 509 as 4000. Do you agree? Explain your answer.7
10. The difference between two odd numbers is odd.Never
11. 11. Mrs C thinks of a number. She multiplies it by 3, adds 7, and divides by 2. How can she get back to her original number?Using the inverse. Times by 2, take away 7, divide by 3.
12. 12. There are 2452 people at a theme park. 538 are children, how many are adults? Use a bar model to help you.1914
13. 13. Asda has 1284 loaves of bread on a morning. During the day, 857 are sold, and another 589 are delivered. How many loaves of bread are left at the end of the day?1284 – 857 + 589= 1016
14. 14. A chocolate factory makes 1568 caramel bars on a Saturday, but 325 less on a Sunday. How many bars are made altogether at the weekend?1568 – 325 = 1243 1243 + 1568 = 2811

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=1. 3541_+_2796_=

Question 1 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=2. 8643_-_1378_=

Question 2 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=3. Round_this_calculation_to_the_nearest_100_to_estimate_the_answer:_324_+_587

Question 3 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=432_+_______=__770

Question 4 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=5. 999_+_999

Question 5 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=782_–_435_=_353

Question 6 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=7. Ellis_has_578_stamps._Ashleigh_has_456_stamps._How_many_stamps_do_they_have_altogether?

Question 7 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=8. Check_the_answer_using_the_inverse:_762_+_345_=_1107

Question 8 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=9. Miss_K_estimates_the_answer_to_3568_+_509_as_4000._Do_you_agree?_Explain_your_answer.

Question 9 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=The_difference_between_two_odd_numbers_is_odd.

Question 10 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=11. Mrs_C_thinks_of_a_number._She_multiplies_it_by_3,_adds_7,_and_divides_by_2._How_can_she_get_back_to_her_original_number?

Question 11 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=12. There_are_2452_people_at_a_theme_park._538_are_children,_how_many_are_adults?_Use_a_bar_model_to_help_you.

Question 12 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=13. Asda_has_1284_loaves_of_bread_on_a_morning._During_the_day,_857_are_sold,_and_another_589_are_delivered._How_many_loaves_of_bread_are_left_at_the_end_of_the_day?

Question 13 (of 14)

 


QR Code Hunt Addition & Subtraction Aut1: QR Challenge

https://www.classtools.net/QR/decode.php?text=14. A_chocolate_factory_makes_1568_caramel_bars_on_a_Saturday,_but_325_less_on_a_Sunday._How_many_bars_are_made_altogether_at_the_weekend?

Question 14 (of 14)