# Mathematics – Stage 3 – Year A – Unit 3

This unit develops the big idea that what needs to be measured determines the unit of measurement.

Mathematics K–10 Syllabus © 2023 NSW Education Standards Authority (NESA) for and on behalf of the Crown in right of the State of New South Wales.

Students are provided with opportunities to:

• measure and compare lengths of objects using millimetres, centimetres, metres and kilometres
• measure, create and compare perimeters of two-dimensional shapes
• represent and read analog, digital, 12-hour and 24-hour time.

## Syllabus focus and content group

### Stage 3

##### Geometric measure A – MAO-WM-01, MA3-GM-02
• Length: Use metres and kilometres for length and distances
• Length: Measure lengths to find perimeters
##### Geometric measure B – MAO-WM-01, MA3-GM-02
• Length: Connect decimal representations to the metric system
• Length: Solve problems involving the comparison of lengths using appropriate units
##### Two-dimensional spatial structure A – MAO-WM-01, MA3-2DS-01

2D shapes: Classify two-dimensional shapes and describe their properties

##### Two-dimensional spatial structure B – MAO-WM-01, MA3-2DS-01

2D shapes: Dissect two-dimensional shapes and rearrange them using translations, reflections and rotations

##### Non-spatial measure A – MAO-WM-01, MA3-NSM-02

Time: Compare 12- and 24-hour time systems and convert between them

##### Non-spatial measure B – MAO-WM-01, MA3-NSM-02

Time: Solve problems involving duration, using 12- and 24-hour time