# Stage 1, mathematics, Year B – Unit 23

What needs to be measured determines the unit of measurement – this unit develops student knowledge, understanding and skills of measurement.

In this unit, students will learn to:

- measure, record, compare and estimate a variety of attributes including length, area, volume, and mass using informal and formal units
- explore and connect mathematical measurement concepts
- apply mathematical measurement techniques to solve problems and communicate their thinking.

**Representing whole numbers A – MAO-WM-01, MA1-RWN-01, MA1-RWN-02**

- Use counting sequences of ones with two-digit numbers and beyond
- Continue and create number patterns
- Represent the structure of groups of ten in whole numbers
- Represent numbers on a line

**Representing whole numbers B – MAO-WM-01, MA1-RWN-01, MA1-RWN-02**

Use counting sequences of ones and tens flexibly

**Combining and separating quantities A – MAO-WM-01, MA1-CSQ-01**

- Use advanced count-by-one strategies to solve addition and subtraction problems
- Use flexible strategies to solve addition and subtraction problems

**Forming groups B – MAO-WM-01, MA1-FG-01**

Represent and explain multiplication as the combining of equal groups

**Geometric measure A – MAO-WM-01, MA1-GM-01, MA1-GM-02, MA1-GM-03**

Length: Compare lengths using uniform informal units

**Geometric measure B – MAO-WM-01, MA1-GM-01, MA1-GM-02, MA1-GM-03**

- Length: Compare and order lengths, using appropriate uniform informal units
- Length: Recognise and use formal units to measure the lengths of objects

**Two-dimensional spatial structure A – MAO-WM-01, MA1-2DS-01, MA1-2DS-02**

- Area: Indirectly compare area
- Area: Measure areas using uniform informal units

**Two-dimensional spatial structure B – MAO-WM-01, MA1-2DS-01, MA1-2DS-02**

Area: Compare rectangular areas using uniform square units of an appropriate size in rows and columns

**Three-dimensional spatial structure A – MAO-WM-01, MA1-3DS-01, MA1-3DS-02**

Volume: Measure and compare the internal volumes (capacities) of containers by filling

**Three-dimensional spatial structure B – MAO-WM-01, MA1-3DS-01, MA1-3DS-02**

Volume: Compare containers based on internal volume (capacity) by filling and packing

**Non-spatial measure – MAO-WM-01, MA1-NSM-01, MA1-NSM-02**

Mass: Investigate mass using an equal-arm balance

## Syllabus

Syllabus outcomes and content descriptors from Mathematics K–10 Syllabus (2022) © NSW Education Standards Authority (NESA) for and on behalf of the Crown in right of the State of New South Wales, 2024.