# Multi-age K–2, mathematics, Year B – Unit 05

New shapes can be made by joining (combining) or partitioning (breaking apart) existing shapes – understanding, and skills of working with existing shapes to create new shapes and linear patterns.

## Syllabus

Syllabus outcomes and content descriptors from the 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.

In this unit students will learn to:

• explore how shapes can be made by joining (combining) and breaking apart (partitioning) existing shapes
• create new shapes by adding or removing sides and vertices (corners)
• recognise how two-dimensional (2D) shapes can be classified into different categories according to features
• create linear patterns with shapes that transform (slides and reflections)
• make designs with symmetry from reflection
• measure areas using uniform informal units
• use concrete materials to model dividing a whole length into halves and then subdividing into quarters
• model sharing and grouping collections of objects to represent division.

### Early Stage 1

Representing whole numbers – MAO-WM-01, MAE-RWN-01, MAE-RWN-02

• Instantly name the number of objects within small collections
• Use the counting sequence of ones flexibly
• Recognise number patterns
• Connect counting and numerals to quantities

Combining and separating quantities – MAO-WM-01, MAE-CSQ-01, MAE-CSQ-02

• Model additive relations and compare quantities
• Identify part-whole relationships in numbers up to 10

Forming groups – MAO-WM-01, MAE-FG-01, MAE-FG-02

Record grouping and sharing

Geometric measure– MAO-WM-01, MAE-GM-02, MAE-GM-03

Length: Create half a length

Two-dimensional spatial structure – MAO-WM-01, MAE-2DS-01, MAE-2DS-02

• 2D shapes: Sort, describe and name familiar shapes
• 2D shapes: Represent shapes

### Stage 1

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

• Part A – Use counting sequences of ones with two-digit numbers and beyond
• Part A – Continue and create number patterns
• Part A – Represent the structure of groups of ten in whole numbers
• Part B – Use counting sequences of ones and tens flexibly

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

• Part A – Use advanced count-by-one strategies to solve addition and subtraction problems
• Part A – Recognise and recall number bonds up to ten
• Part A – Use flexible strategies to solve addition and subtraction problems

Forming groups – MAO-WM-01, MA1-FG-01

Recognise and represent division

Geometric measure – MAO-WM-01, MA1-GM-03

Subdivide lengths to find halves and quarters

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

• 2D shapes: Recognise and classify shapes using obvious features
• 2D shapes: Transform shapes with slides and reflections
• Area: Measure areas using uniform informal units

## Resource

Category:

• Combining and separating quantities
• Forming groups
• Geometric measure
• K-2
• Mathematics (2022)
• Representing whole numbers
• Two-dimensional spatial structure
• Unit