# Mathematics – Multi-age – Year A – Unit 9

Smaller numbers can be found hiding in understanding, and skills of combining and separating quantities.

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:

• represent combining situations in different ways through the use of gesture, enactment, drawings, numbers and words
• use symbols to describe mathematical quantities, actions, and relationships in efficient ways
• understand that the order in which 2 quantities are combined does not change the result
• recognise that when 2 collections have the same total, they are described as ‘equivalent in value’. Words such as ‘equal’, ‘equivalent’, and ‘is the same as’ can also be used

### 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
##### Non-spatial measure– MAO-WM-01, MAE-NSM-01
• Mass: Identify and compare mass using weight

### Stage 1

##### Representing whole numbers – 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
##### Combining and separating quantities– MAO-WM-01, MA1-CSQ-01, MA1-CSQ-02
• Use advanced count-by-one strategies to solve addition and subtraction problems
• Part A: Represent equality
• Part B: Represent and reason about additive relations
• Use flexible strategies to solve addition and subtraction problems
• Part B: Use knowledge of equality to solve related problems
##### Forming groups– MAO-WM-01, MAE-FG-01
• Part A: Count in multiples using rhythmic and skip counting
• Part A: Model and use equal groups of objects to represent multiplication
• Part B: Represent and explain multiplication as the combining of equal groups
##### Non-spatial measure– MAO-WM-01, MAE-NSM-01
• Part A: Mass: Investigate mass using an equal-arm balance
• Part B: Mass: Compare the masses of objects using an equal-arm balance