Eddie and Ellen use a calculator to work out 431.114.3+3.82\displaystyle \frac{431.1}{14.3 + 3.8^2}14.3+3.82431.1
Eddie's answer is 1.5
Ellen's answer is 15
One of those answers is correct.
Use approximations to find out which answer is correct.
Practise AQA GCSE Maths Estimating with exam-style questions for Foundation and Higher tier. 64 questions, matched to the AQA GCSE Maths (8300) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.