Marcus and Mia use a calculator to work out 591.419.8+2.12\displaystyle \frac{591.4}{19.8 + 2.1^2}19.8+2.12591.4
Marcus's answer is 2.4
Mia's answer is 24
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.