🌟 Overview
AC9M2A02 focuses on building fast, accurate recall of addition facts to 20 and using those facts to work out related subtraction facts.
In Year 2, students use hands-on materials, ten-frames, and part-part-whole thinking to understand number relationships, not just memorise them.
📂 Subtopics Included
Includes engaging videos and worksheets for. Please click on the link to access the worksheets and videos for each subtopic:
| Step | Lesson | What You Learn |
|---|---|---|
| 1 | 🧮 Year 2 Addition Facts to 20 | Examples, Activities and Worksheets | ✅ recall addition facts to 20. ✅ use doubles and near doubles to solve addition problems. ✅ use ten-frames to make 10. ✅ bridge to 10 with counters or cubes. ✅ explain how they found an answer |
| 2 | ✏️ Year 2 Fact Families: Examples, Activities and Worksheets | ✅ use addition facts to find related subtraction facts. ✅ explain what a fact family is. ✅ use part-part-whole thinking with numbers to 20. ✅ write matching addition and subtraction facts. ✅ spot patterns in number facts. |
📚 Curriculum Reference
This topic aligns with the Australian Curriculum Version 9 Year 2 Mathematics content descriptor AC9M2A02: “Recall and demonstrate proficiency with addition facts to 20; extend and apply facts to develop related subtraction facts”.
It sits within Year 2 Algebra / Patterns and number facts in curriculum planning resources, with a strong connection to developing recall, reasoning and number relationships.
🔗 Related Learning Areas
These topics work well alongside AC9M2N06:
- 🔢 Recognise, Represent and Order Numbers to 1000 (AC9M2N01)
- 🔟 Partition, Rearrange, Regroup and Rename Two- and Three-Digit Numbers (AC9M2N02)
- ➕ Addition & Subtraction(AC9M2N04)
- 🧩 Multiplication & Division(AC9M2N05)
- ➕ Additive Number Patterns & Missing Numbers (AC9M2A01)
📝 Helpful Tips
- Use ten-frames, counters and quick image models before moving to written facts. These visuals help students build meaning and remember the relationships between facts.
- Teach addition and subtraction together so students can see fact families early. For example, once students know
- 8+7=15
- they should also practise
- 15−8=7
- 15−7=8
- For the partitioning subtopic, encourage students to record findings in a neat system so they can explain how they know they have found all the possibilities. This supports reasoning, not just answer-finding.