# 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

**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

**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 – Represent and reason about additive relations
- 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