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Estimating and checking answers

Year 3 maths · Calculation · 6 skills with hints, step-by-step help from Mago, video lessons and printable practice.

Example questions

  1. Estimate 988 - 137. Round each number to the nearest 10, then subtract.
  2. 378 + 355 = 733. Check: 733 - 355 = 378. Is the addition right?
  3. Tom says 483 + 177 = 660. Is Tom right?
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