estimation in mathematics

Estimate Answers

By the end of this unit, year 3 children will learn how to add and subtract numbers multiples of 100 using number lines and pictorial representations.

Target Age:

Lesson Overview

By the end of this unit, children will be able to:

  1. Understand the purpose of estimation in mathematics.
  2. Use estimation to check the reasonableness of their answers in various calculations.
  3. Compare estimated results with actual results and identify discrepancies.

Curriculum Alignment: Year 4 Measurement:

  • Estimate, compare and calculate different measures, including money in pounds and pence
Last updated on: February 26, 2026

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