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MathematicsMultiplication & DivisionAges 10–12

Estimation to check answers to calculations

Use estimation to check answers to calculations and determine, in the context of a problem, an appropriate degree of accuracy

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Estimate products and quotients to detect unreasonable answers. Decide when an estimate is enough and when an exact answer is needed.

Estimate products and quotients to detect unreasonable answers. Decide when an estimate is enough and when an exact answer is needed.

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KS2 Maths

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KS2 Maths supports Estimation to check answers to calculations. An adult previews and guides; this is a learning page, not a scored quiz.

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Public BBC Bitesize page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.

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Check understanding

  • Estimate 487 × 23 by rounding to 500 × 20 and use this to check a calculated answer
  • Determine whether an exact answer or an estimate is more appropriate in a given context
  • Spot an unreasonable answer by comparing with a quick mental estimate
“Before your child works out a large multiplication or division, can they estimate what the answer should be roughly — and then check whether their final answer is in the right ballpark?”

Curriculum record

Type
Meta
Subject
Mathematics
Domain
Multiplication & Division
Age range
Ages 10–12

Standards

acara-v9:AC9M5N08acara-v9:AC9M6N04acara-v9:AC9M6N08uk-nc-2013:Ma6/2.2i