AC9M2N04
Official content description
add 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
Teach AC9M2N04 this week?
TeachKoala turns this descriptor into a complete lesson — illustrated slides with teacher notes, a differentiated activity sheet and a quiz — aligned to AC9M2N04 specifically, never an invented code. Your first lesson is free.
or see a finished lesson and unit plan first
What Year 2 Maths students should achieve
Coverage is judged against the achievement standard — not by ticking every content description. These are the official Year 2 Maths standard sentences this code builds towards:
- Students recall and demonstrate proficiency with addition and subtraction facts within 20 and multiplication facts for twos.
- Students locate and identify positions of features in two-dimensional representations and move position by following directions and pathways.
- Students identify and represent part-whole relationships of halves, quarters and eighths in measurement contexts.
- They use mathematical modelling to solve practical additive and multiplicative problems, including money transactions, representing the situation and choosing calculation strategies.
- They compare and classify shapes, describing features using formal spatial terms.
- They describe and continue patterns that increase and decrease additively by a constant amount and identify missing elements in the pattern.
The Number progression either side of AC9M2N04
A class can only meet this descriptor if they were taught the one before it. If yours hasn't, that's where the lesson starts — not here.
Taught before · Year 1
- AC9M1N01recognise, represent and order numbers to at least 120 using physical and virtual materials, numerals, number lines and charts
- AC9M1N02partition one- and two-digit numbers in different ways using physical and virtual materials, including partitioning two-digit numbers into tens and ones
- AC9M1N03quantify sets of objects, to at least 120, by partitioning collections into equal groups using number knowledge and skip counting
Builds towards · Year 3
- AC9M3N01recognise, represent and order natural numbers using naming and writing conventions for numerals beyond 10 000
- AC9M3N02recognise and represent unit fractions including 1/2, 1/3, 1/4, 1/5 and 1/10 and their multiples in different ways; combine fractions with the same denominator to complete the whole
- AC9M3N03add and subtract two- and three-digit numbers using place value to partition, rearrange and regroup numbers to assist in calculations without a calculator
Other Year 2 Number codes
- AC9M2N01recognise, represent and order numbers to at least 1000 using physical and virtual materials, numerals and number lines
- AC9M2N02partition, 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
- AC9M2N03recognise and describe one-half as one of 2 equal parts of a whole and connect halves, quarters and eighths through repeated halving
- AC9M2N05multiply and divide by one-digit numbers using repeated addition, equal grouping, arrays, and partitioning to support a variety of calculation strategies
- AC9M2N06use 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
Content description and achievement standard © Australian Curriculum, Assessment and Reporting Authority (ACARA), Australian Curriculum Version 9, used under CC BY 4.0. TeachKoala is not affiliated with or endorsed by ACARA.