Approximating Calculations – Foundation – GCSE Questions These questions are the same format as previous GCSE exams. COPY means they use the exact same numbers as the original GCSE question. Otherwise, they are clone questions using different numbers. The worksheets are provided in a variety of sizes.

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GCSE GCSE GCSE GCSE Edexcel Foundation: November 2017 Paper 1, Q20 Sarah and Jay use a calculator to work out 465 3.122+6.8 1 Sarah and Jay use a calculator to work out 465 3.122+6.8 Sarah’s answer is 28.1231 Jay’s answer is 281.231 One of these answers is correct. Use approximations to find out which answer is correct. Sarah’s answer is 28.1231 Jay’s answer is 281.231 One of these answers is correct. Use approximations to find out which answer is correct. (Total for Question 1 is 3 marks) (Total for Question 1 is 3 marks) GCSE GCSE Edexcel Foundation: November 2017 Paper 1, Q20 Edexcel Foundation: November 2017 Paper 1, Q20 1 Sarah and Jay use a calculator to work out 465 3.122+6.8 465 3.122+6.8 1 Sarah and Jay use a calculator to work out Sarah’s answer is 28.1231 Jay’s answer is 281.231 One of these answers is correct. Use approximations to find out which answer is correct. Sarah’s answer is 28.1231 Jay’s answer is 281.231 One of these answers is correct. Use approximations to find out which answer is correct. (Total for Question 1 is 3 marks) (Total for Question 1 is 3 marks)

GCSE Edexcel Foundation: May 2018 Paper 1, Q22 1 A cycle race across Europe is 2056.23 miles in length. Annie knows her average speed for her previous races is 25.32 miles per hour. For the next race she will cycle 8 hours a day. (a) Estimate how many days Annie will take to complete the race. Annie trains for the race. The average speed she can cycle at increases. It is now 26.34 miles per hour. (b) How does this affect your answer to part (a)? (Total for Question 1 is 4 marks)

GCSE Edexcel Foundation: November 2017 Paper 1, Q20 465 3.122+6.8 Sarah and Jay use a calculator to work out 465 3.122+6.8 Sarah’s answer is 28.1231 Jay’s answer is 281.231 One of these answers is correct. Use approximations to find out which answer is correct. (Total for Question 1 is 3 marks)

GCSE Edexcel Foundation: May 2018 Paper 1, Q22 1 A cycle race across Europe is 2056.23 miles in length. Annie knows her average speed for her previous races is 25.32 miles per hour. For the next race she will cycle 8 hours a day. (a) Estimate how many days Annie will take to complete the race. Annie trains for the race. The average speed she can cycle at increases. It is now 26.34 miles per hour. (b) How does this affect your answer to part (a)? (Total for Question 1 is 4 marks)

Sarah’s answer is correct. GCSE Edexcel Foundation: November 2017 Paper 1, Q20 1 Sarah and Jay use a calculator to work out 465 3.122+6.8 Sarah’s answer is 28.1231 Jay’s answer is 281.231 One of these answers is correct. Use approximations to find out which answer is correct. 465 3.122+6.8 ≈ 500 9+7 = 500 16 ≈ 500 20 = 50 2 = 25 Sarah’s answer is correct. (Total for Question 1 is 3 marks)

25 2000 GCSE Miles per day = 25 miles per hour x 8 hours = 200 miles Edexcel Foundation: May 2018 Paper 1, Q22 1 A cycle race across Europe is 2056.23 miles in length. Annie knows her average speed for her previous races is 25.32 miles per hour. For the next race she will cycle 8 hours a day. (a) Estimate how many days Annie will take to complete the race. 2000 25 Miles per day = 25 miles per hour x 8 hours = 200 miles 2000 total miles ÷ 200 miles per day = 10 days OR) 2000 ÷ 25 ÷ 10 = 8 days Annie trains for the race. The average speed she can cycle at increases. It is now 26.34 miles per hour. (b) How does this affect your answer to part (a)? Less days will be required, OR, it will not affect the answer because I will still round down to 25. (Total for Question 1 is 4 marks)

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