Question 2
By rounding each number to one significant figure, work out an estimate for the value of
Show your working clearly.
Edexcel IGCSE Math A Higher 1.8.D estimation for numerical calculations
Practise estimation questions by rounding every number first and using the simplified calculation to judge whether an answer is sensible.
How this is tested
- Round each number to 1 significant figure before estimating products, divisions or roots.
- Compare an approximate result with a calculator answer to decide whether it is sensible.