# Multi-age K–2, mathematics, Year A – Unit 04

Develop students' knowledge, understanding and skills in using combinations of numbers through this two-week, multi-age sample unit – Smaller numbers can be found hiding in bigger numbers.

## 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:

• count out a given number of objects from a larger collection
• represent numbers as quantities using objects and numbers
• create, model and recognise number combinations for numbers up to 10
• count on from the largest number to find the total of 2 numbers
• recognise and recall different combinations of 2 numbers that add up to a given number
• identify patterns to find all combinations for a given number
• use the bar model to represent parts of a number
• identify and combine numbers which make doubles facts
• describe combinations for numbers using words such as ‘more than’, and ‘less than’, and ‘double’
• find smaller numbers inside larger numbers
• identify near doubles by doubling the smaller number and adding one more or doubling the larger number and subtracting one less
• recognise and record numbers in different representations including words, numerals and known structures such as dice, rekenreks and ten-frames.

## Syllabus focus area and content groups

### 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

### 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 numbers on a line
• Part A – Represent the structure of groups of ten in whole numbers

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

• 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

## Resource

Category:

• Combining and separating quantities
• K-2
• Mathematics (2022)
• Representing whole numbers
• Unit