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Year 1 · Mathematics · Number

AC9M1N04

add and subtract numbers within 20, using physical and virtual materials, part-part-whole knowledge to 10 and a variety of calculation strategies

The content description above is Australian Curriculum, Assessment and Reporting Authority (ACARA)’s own wording, reproduced unmodified from the Australian Curriculum v9.0, read in August 2026, and licensed CC BY 4.0.

© Australian Curriculum, Assessment and Reporting Authority (ACARA) 2010 to present, unless otherwise indicated. This material was downloaded from the Australian Curriculum website and was not modified. ACARA does not endorse this product and is not affiliated with it.

Taught alongside it

The rest of Number in Year 1.

AC9M1N01

recognise, represent and order numbers to at least 120 using physical and virtual materials, numerals, number lines and charts

AC9M1N02

partition one- and two-digit numbers in different ways using physical and virtual materials, including partitioning two-digit numbers into tens and ones

AC9M1N03

quantify sets of objects, to at least 120, by partitioning collections into equal groups using number knowledge and skip counting

AC9M1N05

use mathematical modelling to solve practical problems involving additive situations including simple money transactions; represent the situations with diagrams, physical and virtual materials, and use calculation strategies to solve the problem

AC9M1N06

use mathematical modelling to solve practical problems involving equal sharing and grouping; represent the situations with diagrams, physical and virtual materials, and use calculation strategies to solve the problem

The same idea, year by year

Where AC9M1N04 comes from and where it goes, for a student working below or above Year 1.

  1. Foundation YearAC9MFN01name, represent and order numbers including zero to at least 20, using physical and virtual materials and numerals
  2. Foundation YearAC9MFN02recognise and name the number of objects within a collection up to 5 using subitising
  3. Foundation YearAC9MFN03quantify and compare collections to at least 20 using counting and explain or demonstrate reasoning
  4. Foundation YearAC9MFN04partition and combine collections up to 10 using part-part-whole relationships and subitising to recognise and name the parts
  5. Foundation YearAC9MFN05represent practical situations involving addition, subtraction and quantification with physical and virtual materials and use counting or subitising strategies
  6. Foundation YearAC9MFN06represent practical situations that involve equal sharing and grouping with physical and virtual materials and use counting or subitising strategies
  7. Year 2AC9M2N01recognise, represent and order numbers to at least 1000 using physical and virtual materials, numerals and number lines
  8. Year 2AC9M2N02partition, rearrange, regroup and rename two- and three-digit numbers using standard and non-standard groupings; recognise the role of a zero digit in place value notation
  9. Year 2AC9M2N03recognise and describe one-half as one of 2 equal parts of a whole and connect halves, quarters and eighths through repeated halving
  10. Year 2AC9M2N04add and subtract one- and two-digit numbers, representing problems using number sentences, and solve using part-part-whole reasoning and a variety of calculation strategies
  11. Year 2AC9M2N05multiply and divide by one-digit numbers using repeated addition, equal grouping, arrays, and partitioning to support a variety of calculation strategies
  12. Year 2AC9M2N06use mathematical modelling to solve practical problems involving additive and multiplicative situations, including money transactions; represent situations and choose calculation strategies; interpret and communicate solutions in terms of the situation

Planning against AC9M1N04?

Daily Work Pad reads codes like this one out of your forward plan and carries them onto your lessons and worksheets. The pilot is invite-only for now.