Eddie and Ellen use a calculator to work out 295.39.4+3.92\displaystyle \frac{295.3}{9.4 + 3.9^2}9.4+3.92295.3
Eddie's answer is 1.2
Ellen's answer is 12
One of those answers is correct.
Use approximations to find out which answer is correct.
247 exam-style questions on AQA GCSE Maths Estimating. Each one has a worked solution and a mark scheme showing where the marks go.