Estimation and Approximation | 40 Worked Examples | Edexcel GCSE Higher Maths

40 fully worked questions on estimation and approximation for Edexcel GCSE Higher Maths (1MA1), with every line of working explained and mark-scheme annotated. Builds from rounding basics up to the trickiest exam skill in this topic: justifying whether an estimate is an overestimate or an underestimate.

What’s inside:
Easy: rounding to 1 significant figure and to a given number of decimal places, plus simple one-step estimates.
Medium: estimating multi-term calculations by rounding every number to 1 significant figure first, including decimals, division, money and measures, and finding which two consecutive integers a square root lies between.
Hard: estimating an expression and then explaining, with reasoning from the direction each number was rounded, whether the estimate overshoots or undershoots the exact value, alongside squares, roots and real-world contexts.

Each question shows the final answer in blue, step-by-step working with a plain-English explanation for every step, and mark-scheme style annotations (B1, M1, A1) at the page margin so students can see exactly where marks are earned. Ideal for Year 10 and Year 11 students studying Edexcel GCSE Higher tier (1MA1), and for tutors and teachers setting homework, revision or exam practice on rounding and estimation.