4:37 How to Estimate in Maths (2026/27 exams)
Clear, concise walkthrough of estimating calculations by rounding to 1 significant figure with worked examples.
Estimating and reasonableness checks
Estimate and check calculations are reasonable
4 hand-picked video lessons for this topic, each checked for relevance and clarity, graded by difficulty and labelled by depth. Press play to watch — nothing loads from YouTube until you do.
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5:46 Rounding & Estimation (How to Estimate In Maths) - GCSE & IGCSE Maths
Save My Exams covers rounding to 1 sig fig plus over- and under-estimates with clear examples.
4:00 Approximations to Calculations - Corbettmaths
Corbettmaths explains how to approximate calculations by rounding, a trusted GCSE staple.
16:26 Estimation
Thorough Maths Genie tutorial covering estimation for GCSE with plenty of worked examples.