Mathematics / Year 4 / Number

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Curriculum content descriptions

choose and use estimation and rounding to check and explain the reasonableness of calculations including the results of financial transactions (AC9M4N07)

Elaborations
  • using proficiency with basic facts to estimate the result of a calculation and say what amounts the answer will be between; for example, \(5\) packets of biscuits at \(\$2.60\) each will cost between \(\$10\) and \(\$15\) as \(5 \times\) \(\$2 =\$10\) and \(5\times\$3=\$15\)
  • using rounded amounts to complete an estimated budget for a shopping trip or an excursion, explaining why overestimating the amounts is appropriate
  • recognising the effect of rounding in addition and multiplication calculations; rounding both numbers up, both numbers down and one number up and one number down, and explaining which is the best approximation and why
General capabilities
  • Critical and creative thinking Critical and Creative Thinking
  • Numeracy Numeracy
ScOT terms

Estimation (Number operations),  Rounding

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