VC2M4N07
choose and use estimation and rounding to check and explain the reasonableness of calculations, including the results of financial transactions
Elaborations
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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 × $2 = $10 and 5 × $3 = $15
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using rounded amounts to complete an estimated budget for a shopping trip or an excursion, explaining why overestimating the amounts is appropriate
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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
VC2M4N07 | Mathematics | Mathematics Version 2.0 | Level 4 | Number
