# Mathematics – Multi-age – Year B – Unit 5

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.

Mathematics K-2 Syllabus © 2021 NSW Education Standards Authority (NESA) for and on behalf of the Crown in right of the State of New South Wales.

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 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
##### 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 – MAO-WM-01, MA1-CSQ-01
• Recognise and recall number bonds up to ten
• 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