AC9M4N07
Year 4
Mathematics
AC9M4N07 | Year 4 Mathematics: Number
Content Descriptor
Content descriptor choose and use estimation and rounding to check and explain the reasonableness of calculations including the results of financial transactions
Strand
Number
Substrand
Number
This content descriptor sets out learning for Year 4 Mathematics. Use it to plan lessons and assessment with the Australian Curriculum v9.
Elaborations
- • Elaboration 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
- • Elaboration using rounded amounts to complete an estimated budget for a shopping trip or an excursion, explaining why overestimating the amounts is appropriate
- • Elaboration 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
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