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What estimating means

What estimating means

Three number lines showing 48.7 rounding to 50, 0.196 rounding to 0.2, and 431.1 rounding to 400 to one significant figure

Estimating means giving a sensible answer that is close to the exact value. In IGCSE questions, you usually round awkward numbers first so the arithmetic is quick and mental.

Estimating Lesson

  1. IGCSE
  2. /Maths
  3. /Estimating

Step-by-step lessons covering Oxford AQA IGCSE Maths Estimating for Core and Extended tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 (Core: 1C and 2C; Extension: 1E and 2E) format. Since content from any part of the specification can appear on either paper, keep number and algebra fluency sharp throughout the course rather than leaving it until near the exam.

Lessons

FractionsEstimatingWriting and Simplifying RatioRatioPercentagesPercentage ChangeExchange RatesBest Buy QuestionsSubstitutionSolving EquationsArea and Circumference of CirclesArea of Compound ShapesFrequency Trees