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Year 3 · Maths

Estimate And Check Answers

8 checked activities 2 video matches

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Focus on estimating and checking answers using inverse operations. Start with “Check Subtractions by Using Addition”, then explain the idea in your own words.

Year 3 learners practise estimating and checking answers using inverse operations.

The activities include Check Subtractions by Using Addition, Estimate Addition Questions Using Rounding to Nearest Ten, Estimate Additions by Rounding to the Nearest 100, and related practice. The checked support below includes video, worksheet, teaching, teaching-practice. Open a resource in its provider's website and choose the format that best helps the learner explain the idea independently.

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Activities covered

  • Check Subtractions by Using Addition
  • Estimate Addition Questions Using Rounding to Nearest Ten
  • Estimate Additions by Rounding to the Nearest 100
  • Estimate Additions Using Rounding
  • Round Numbers to Estimate Addition and Subtraction Problems
  • Round Numbers with Three Digits to Estimate Subtraction Questions
  • Use Addition to Check Subtractions
  • Use Knowledge of Numbers to Estimate Answers and Check Using the Inverse Operation.

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Oak National Academy, BBC Bitesize, Corbettmaths and Mathsframe normally open with no account. Twinkl access varies by resource, so we only show a free label after checking the resource's own page. Unconfirmed access appears only under Everything.

1

Watch it explained

a teacher walks through it

WatchOak National Academy

Check Answers Using the Inverse

Best for: a clear explanation before you practise

FreeVerified match
Open video
2

Learn it properly

lessons and teaching pages

LearnBBC Bitesize

KS2 Rounding and Estimating

Best for: worked examples and step-by-step teaching

FreeVerified match
Open lesson
3

Practise it

questions and activities to try

4

Print and finish

worksheets away from the screen