Eddie and Ellen use a calculator to work out 419.113.5+3.82\displaystyle \frac{419.1}{13.5 + 3.8^2}13.5+3.82419.1
Eddie's answer is 1.5
Ellen's answer is 15
One of those answers is correct.
Write down suitable approximations for 419.1, 13.5 and 3.8.
Use approximations to find out which answer is correct.
247 exam-style questions on Eduqas GCSE Maths Estimating. Each one has a worked solution and a mark scheme showing where the marks go.