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

Smaller numbers can be found hiding in bigger numbers – this unit provides opportunities to further develop students' knowledge, understanding and skills of combinations of numbers that add up to a given number.

## 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:

• recognising and representing numerals to 10
• counting small collections of objects
• identifying combinations of 2 numbers that add up to numbers less than 10
• representing numbers 0–20 with drawings, numerals, symbols, and words
• counting with one-to-one correspondence, recognising that the last number name represents the total number in the collection
• using a ten-frame to represent smaller parts of a number
• exposure to representing numbers on a rekenrek.

### 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 – Represent numbers on a line
• Part A – Represent the structure of groups of ten in whole numbers
• Part B – Use counting sequences of ones and tens flexibly
• Part B – Form, regroup, and rename three-digit numbers

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

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

## Resource

Category:

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