AC9M4N07 Year 4 Mathematics

This Content Descriptor from Year 4 Mathematics provides the specific knowledge and skills students should learn. Use it to plan lessons, create learning sequences, and design assessments that align with the Australian Curriculum v9.

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

Elaborations

• 1 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 \(5\times\$3=\$15\)
• 2 using rounded amounts to complete an estimated budget for a shopping trip or an excursion, explaining why overestimating the amounts is appropriate
• 3 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

Related Achievement Standards