Mathematics – Multi-age – Year B – Unit 16

This two-week unit develops student knowledge and skills in understanding different situations where addition, subtraction, multiplication and division can be used.

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.

Students are provided opportunities to:

  • investigate the 4 operations through problem solving
  • explore the relationship between different operations and inverse operations
  • engage in meaningful activities using repeated halving and doubling (Stage 1).

Syllabus focus and content group

Representing whole numbers – MAO-WM-01, MAE-RWN-01, MA1-RWN-01 MAE-RWN-02, MA1-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, MA1-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, MA1-FG-01, MAE-FG-02
  • Investigate and form equal groups by sharing
  • Record grouping and sharing


Representing whole numbers A
  • Represent numbers on a line
  • Represent the structure of groups of ten in whole numbers
Representing whole numbers B
  • Use counting sequences of ones and tens flexibly
  • Form, regroup, and rename three-digit numbers
Combining and separating quantities A
  • Use advanced count-by-one strategies to solve addition and subtraction problems
  • Recognise and recall number bonds up to ten
  • Use flexible strategies to solve addition and subtraction problems
  • Represent equality
Combining and separating quantities B
  • Represent and reason about additive relations
  • Form multiples of ten when adding and subtracting two-digit numbers
  • Use knowledge of equality to solve related problems
Forming groups A
  • Count in multiples using rhythmic and skip counting
  • Use skip counting patterns
  • Model and use equal groups of objects to represent multiplication
  • Recognise and represent division
Forming groups B
  • Represent and explain multiplication as the combining of equal groups
  • Model doubling and halving with fractions
  • Represent multiplication and division problems
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