# Stage 1, mathematics, Year B – Unit 21

Collections of ten are really useful – this unit introduces students to the big idea that collections of 10 are really useful.

In this unit students will learn to:

• sort objects and numbers according to their attributes
• collect and play informally with objects, such as pattern blocks and counters
• count large collections of objects by grouping them into tens
• collect and analyse data.

### Syllabus focus and content groups

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 numbers on a line
• 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
• Form, regroup, and rename three-digit numbers

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

• Recognise and recall number bonds up to ten
• Use flexible strategies to solve addition and subtraction problems
• Represent equality

Combining and separating quantities B – MAO-WM-01, MA1-CSQ-01, MA1-CSQ-02

• Use knowledge of equality to solve related problems
• Form multiples of ten when adding and subtracting two-digit numbers

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

Recognise and classify shapes using obvious features

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

Represent, combine and separate two-dimensional shapes

Data A – MAO-WM-01, MA1-DATA-01, MA1-DATA-02

• Ask questions and gather data
• Represent data with objects and drawings and describe the displays

Data B – MAO-WM-01, MA1-DATA-01

• Identify a question of interest and gather relevant data
• Create displays of data and interpret them

## 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.

Category:

• Combining and separating quantities
• Data
• Mathematics (2022)
• Representing whole numbers
• Stage 1
• Two-dimensional spatial structure
• Unit