Harry and Hannah use a calculator to work out 299.412.1+3.02\displaystyle \frac{299.4}{12.1 + 3.0^2}12.1+3.02299.4
Harry's answer is 1.4
Hannah's answer is 14
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.