What students learn in AC9M2N02
This unit helps students build a clear, usable understanding of Partition, rearrange, regroup and rename two- and three-digit numbers using.... The goal is not to memorise one answer pattern. Students should be able to explain the idea, recognise it in a new example and apply it in a short practice or worksheet task.
- Start with the main idea: partition, 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.
- Use concrete examples, pictures, oral explanation and short written responses before moving to independent practice.
- comparing the digits of a number with materials grouped into hundreds, tens and ones, and explaining the meaning of each of the digits in the materials renaming numbers in different ways using knowledge of place value; for example, renaming 245 as 24 tens and 5 ones or 2 hundreds and 45 ones
- Finish with mixed questions so students must choose the correct strategy rather than copy the last example.
Curriculum coverage and elaborations
The content description and elaborations below show the curriculum ideas taught in this unit. Items marked as teaching context support lesson planning but may not appear in the initial eight-question activity.
- Content description: partition, 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
- E1: comparing the digits of a number with materials grouped into hundreds, tens and ones, and explaining the meaning of each of the digits in the materials
- E2: renaming numbers in different ways using knowledge of place value; for example, renaming 245 as 24 tens and 5 ones or 2 hundreds and 45 ones
How to use this unit
Read the topic guide, use the teacher slide for instruction, then complete the Worksheet, Practice and Test. These three activities use the same eight-question unit bank.
Teacher resource
AC9M2N02 teacher slide
Use this one-page PDF to introduce the key idea, vocabulary and teaching sequence before students begin the activities.
Open teacher slide (PDF)Common mistakes to watch for
- Rushing to a rule before checking the concrete model, drawing or number sentence.
- Using the correct answer once but not being able to explain why it works.
- Mixing up similar vocabulary such as more/less, before/after, longer/shorter or equal groups/sharing.
International curriculum mapping
This table gives closest-topic mapping for search and planning. The Australian Curriculum code is exact; overseas entries are broad equivalents because each jurisdiction structures outcomes differently.
| Region | Curriculum | Closest mapping |
|---|---|---|
| Australia | Australian Curriculum v9.0 | AC9M2N02 — partition, 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 |
| Victoria | Victorian Curriculum F-10 | Year 2 Maths: closest match in Number. Use this page as a VIC-aligned practice and worksheet reference. |
| NSW | NSW Curriculum | Stage 1 Maths: closest content focus for Partition, rearrange, regroup and rename two- and three-digit numbers using... and related outcomes. |
| United States | Common Core / NGSS | Grade 2 Common Core Mathematics/ELA closest topic match for Partition, rearrange, regroup and rename two- and three-digit numbers using.... |
| England / UK | National Curriculum | Key Stage 1 / Year 2: closest programme-of-study match for Partition, rearrange, regroup and rename two- and three-digit numbers using.... |
| Canada | Provincial and territory curricula | Grade 2 closest topic match. Canada varies by province, so use this as a broad Ontario/BC-style learning outcome reference. |
| New Zealand | New Zealand Curriculum | Level 1 Maths: closest achievement-objective topic for Partition, rearrange, regroup and rename two- and three-digit numbers using.... |
| India | NCERT / CBSE | Class 2 closest NCERT/CBSE topic match for Partition, rearrange, regroup and rename two- and three-digit numbers using.... |