Chapter 1

Whole Numbers and Operations

Working confidently with bigger whole numbers and their operations — breaking sums into easy steps and estimating to check — with an interactive exercise.

In Year 5 we handle bigger whole numbers and their operations confidently.

For example, 25 × 4 = 100. Break tricky sums into easy steps and estimate to check.

Remember

  • Estimate first, then calculate, then check.
  • Use round numbers to make mental maths easier.

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