Australian Curriculum Year 4 Mathematics (AC9M4M02)

AC9

Australian Curriculum V9

Mathematics

Year 4

Measurement

Content Descriptor Number

Inspired by AC9M4M02 of the Australian Curriculum Version 9.0, material in this section may help your child recognise ways of measuring and approximating the perimeter and area of shapes and enclosed spaces, using appropriate formal and informal units. It may also help further understanding in:

recognising that perimeter is the sum of the lengths that form the boundary of a shape or enclosed space; choosing suitable units from a range of objects to measure around the boundary of a shape such as a garden bed; comparing the results to say which unit was an appropriate choice for the context; using a piece of string or rope to measure the perimeter of irregular shapes and enclosed spaces, including those that have curved sections (AC9M4M02_E1)
creating a range of rectangles representing “paddocks” on grid paper and establishing different methods of working out the length of the boundary fences; explaining that the more efficient methods involve adding the side lengths rather than counting squares (AC9M4M02_E2)
recognising that area is the space enclosed by the boundary of a shape or the surface of an object; measuring and comparing the area of shapes, using an array of paper tiles or mosaic squares, including part units to fill gaps at the edge of the shapes; comparing the total areas by combining the fractional parts to make whole units (AC9M4M02_E3)
demonstrating how to use one unit repeatedly to measure the area of a shape; for example, using one paper square to measure and compare the area of a rectangle and a triangle; recording and explaining how they used part units to give a more accurate measure, and why they needed to ensure there were no gaps or overlaps (AC9M4M02_E4)
investigating the ways First Nations Ranger Groups and other groups measure areas of land to make decisions about fire burns to care for Country/Place (AC9M4M02_E5)

Source: ACARA (CC BY 4.0). See copyright page for full attribution.

Year 4 Mathematics Learning Resources

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