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QR Challenge: mental arithmetic 4

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. Write in figures the number that is 9 less than 1000991
2. Add together 138 and 162300
3. Subtract 145 from 24499
4. The probability of a train being on time is 0.7, what is the probability of it being late?0.3
5. Multiply 6.3 by one thiusand6300
6. Simplify the expression 5a+7a12a
7. I face west and turn 90 degrees clockwise, what direction will I be facing?north
8. Fifty percent of a number is 31, what is the number62
9. If 17x60=1020, what is 17x6?102
10. What is an approximate answer for 49% of £32.45?£15
11. What is two fifths of 30kg?12kg
12. When m=7, what is the value of 3(m+3)?30
13. What is two hundred and seventy three multiplied by four?1092
14. What is the area of a parallelogram with base 7cm and height 4cm?28 square cm
15. Solve the equation 4x=3x+7x=7
16. Write three fifths as a decimal0.6

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=Write_in_figures_the_number_that_is_9_less_than_1000

Question 1 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=Add_together_138_and_162

Question 2 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=Subtract_145_from_244

Question 3 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=The_probability_of_a_train_being_on_time_is_0.7,_what_is_the_probability_of_it_being_late?

Question 4 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=Multiply_6.3_by_one_thiusand

Question 5 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=Simplify_the_expression_5a+7a

Question 6 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=I_face_west_and_turn_90_degrees_clockwise,_what_direction_will_I_be_facing?

Question 7 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=Fifty_percent_of_a_number_is_31,_what_is_the_number

Question 8 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=If_17x60=1020,_what_is_17x6?

Question 9 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_an_approximate_answer_for_49%_of_£32.45?

Question 10 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_two_fifths_of_30kg?

Question 11 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=When_m=7,_what_is_the_value_of_3(m+3)?

Question 12 (of 16)

 


mental arithmetic 4: QR Challenge

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

Question 13 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=What_is_the_area_of_a_parallelogram_with_base_7cm_and_height_4cm?

Question 14 (of 16)

 


mental arithmetic 4: QR Challenge

https://www.classtools.net/QR/decode.php?text=Solve_the_equation_4x=3x+7

Question 15 (of 16)

 


mental arithmetic 4: QR Challenge

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

Question 16 (of 16)