AC9M2N03 Year 2 Mathematics

This Content Descriptor from Year 2 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.

recognise and describe one-half as one of 2 equal parts of a whole and connect halves, quarters and eighths through repeated halving

Elaborations

• 1 creating halves of a range of collections sets by sharing collections into \(2\) equal groups; for example, comparing half of a set of \(12\) washers with half of a set of \(8\) bolts to identify how they both represent one-half of their respective set
• 2 creating halves using measurement attributes; for example, explaining that “a half is one part out of \(2\) equal parts of a whole”; equally folding a strip of paper, dividing a lump of playdough or separating a cup of water into \(2\) equal parts, then selecting one of the parts and naming it “one-half”; comparing half of a collection of \(10\) counters with half of a shape or object and explaining how each shows one-half of their respective wholes
• 3 using repeated halving to subdivide shapes and objects in different ways to make corresponding halves, quarters and eighths; naming the parts and comparing the size of them to notice that they are all the same size, and demonstrating that a quarter is a half of a half and that an eighth is a half of a quarter
• 4 dividing a shape into equal parts and relating the number of parts to the unit fraction; for example, if there are \(4\) equal parts then each part is a one-quarter and if there are \(8\) equal parts then each is one-eighth

Related Achievement Standards