# Multi-age K–2, mathematics, Year B – Unit 20

This two-week unit develops student knowledge, understanding and skills to solve mathematical problems using critical and strategic thinking.

## 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.

Students are provided opportunities to:

• sequence events using a range of methods
• solve time and duration problems using calendars and clocks
• solve and record addition and subtraction problems using objects, diagrams and images
• record answers to multiplication and division problems (including those with remainders) using drawings, words and numerals.

## Syllabus focus and content groups

### Early Stage 1

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

Forming groups – MAO-WM-01, MAE-FG-01, MAE-FG-02

• Investigate and form equal groups by sharing
• Record grouping and sharing

Non-spatial measure – MAE-NSM-01, MAE-NSM-02

• Time: Compare and order the duration of events using the language of time
• Time: Tell time on the hour on analog and digital clocks

### 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 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 – Use flexible strategies to solve addition and subtraction problems
• Part B – Form multiples of ten when adding and subtracting two-digit numbers
• Part B – Use knowledge of equality to solve related problems

Forming groups – MAO-WM-01, MA1-FG-01

• Part A – Model and use equal groups of objects to represent multiplication
• Part A – Recognise and represent division
• Part B – Represent and explain multiplication as the combining of equal groups
• Part B – Represent multiplication and division problems

Geometric measure – MAO-WM-01, MA1-GM-01

Part A – Position: Follow directions to familiar locations

Non-spatial measure – MAO-WM-01, MA1-NSM-02

Part B – Time: Describe duration using units of time

## Resource

Category:

• Combining and separating quantities
• Forming groups
• K-2
• Mathematics (2022)
• Non-spatial measure
• Representing whole numbers
• Unit