AC9M6N08 Year 6 Mathematics

Content descriptor approximate numerical solutions to problems involving rational numbers and percentages, including financial contexts, using appropriate estimation strategies

Elaborations

• • Elaboration using familiar fractions, decimals and percentages to approximate calculations, such as, 0.3 of 180 is about a 1/3 of 180 or 52% is about a 1/2
• • Elaboration choosing appropriate estimation strategies including rounding to the nearest whole number, knowledge of multiples of 2, 5 or 10 and partitioning numbers in contexts such as measuring or cost per unit
• • Elaboration recognising the effect of rounding on calculations involving fractions or decimals and saying what numbers the answer will be between
• • Elaboration recognising the usefulness of estimation to check calculations for contexts such as dividing wood into a number of lengths, calculating cost per unit, reducing a recipe or dividing the cost of dinner for a group into individual amounts
• • Elaboration verifying solutions by estimating percentages in suitable contexts such as discounts using common percentages of 10%, 25%, 30%, 50% and 1%
• • Elaboration investigating estimation strategies to make decisions about steam cooking in ground ovens by First Nations Australians, including catering for different numbers of people and resources needed for cooking