AC9M7N05

round decimals to a given accuracy appropriate to the context and use appropriate rounding and estimation to check the reasonableness of solutions

Elaborations

AC9M7N05_E1 - identifying the interval between a pair of consecutive integers that includes a given rational number
AC9M7N05_E2 - choosing and applying conventions for rounding correct to a specified number of decimal places based upon the context
AC9M7N05_E3 - checking that the accuracy of rounding is suitable for context and purpose, such as the amount of paint required and cost estimate for renovating a house; for example, purchasing $2$ litres of paint to paint the bedroom even though $1.89$ litres is the exact answer or estimating a renovation budget to the nearest $\$100$

Achievement Standard Components

ASMAT704 - They use all 4 operations in calculations involving positive fractions and decimals, choosing efficient calculation strategies.