# Mathematics – Multi-age – Year B – Unit 1

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

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:

• count collections of objects by organising them and paying attention to the structure of groups
• combine and separate quantities
• recognise and explain how a collection of objects has been sorted
• describe two-dimensional spatial structures
• organise information into simple data displays and interpret these displays.

### 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
##### 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
##### Data– MAO-WM-01, MAE-DATA-01, MAE-DATA-02
• Respond to questions, collect information and discuss possible outcomes of activities
• Organise objects into simple data displays and interpret the displays

### Stage 1

##### Representing whole numbers – MA1-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
• Use counting sequences of ones and tens flexibly
• Form, regroup and rename three-digit numbers
##### Combining and separating quantities– MA1-WM-01, MA1-CSQ-01, MA1-CSQ-02
• Use advance count by one strategies to solve addition and subtraction problems
• Recognise and recall number bonds up to ten
• Use flexible strategies to solve addition and subtraction problems
• Represent equality
• Form multiples of ten when adding and subtracting two-digit numbers
• Use knowledge of equality to solve related problems
##### Two-dimensional spatial structure – MA1-WM-01, MA1-2DS-01, MA1-2DS-02
• Recognise and classify shapes using obvious features
• Represent, combine and separate two-dimensional shapes
##### Data– MA1-WM-01, MA1-DATA-01, MA1-DATA-02
• Ask questions and gather data
• Represent data with objects and drawings and describe the displays
• Identify a question of interest and gather relevant data
• Create displays of data and interpret them