🎓 Year 3 (ACARA Code : AC9M3A02)
🎯Focus:
🧠 Apply mental strategies like partitioning, bridging through 10/100, and place value understanding
🔁 Use known number facts to solve larger, unfamiliar calculations efficiently
🔍 Recognise patterns in numbers to support faster and more accurate mental computation ⚡ Develop flexible thinking by choosing the most efficient strategy for each problem
Video Lessons
🎬✨ New Lesson Video Coming Soon
Our team is currently preparing this lesson video 🎓
🔔 Don’t miss the upload — subscribe to our YouTube channel here:
👉SparkEduZone
📹 Video Lesson Tips
👉 Start with a familiar fact (e.g. 8 + 6 = 14) and show how it extends to larger numbers (e.g. 80 + 60, 800 + 600)
👉 Use clear place value visuals (hundreds, tens, ones) to show how numbers are broken apart and recombined
👉 Model “bridging through 10 or 100” slowly so students can see each step of the strategy
👉 Use visual aids like number lines, base-ten blocks, or bar models to support understanding
💡 Key Ideas (Quick Guide)
✏️ Place value is key to breaking larger numbers into easier parts for mental calculation
✏️ Known number facts can be scaled up to solve larger addition and subtraction problems
✏️ Strategies like partitioning, bridging through 10 and 100, and compensation improve efficiency
✏️ Understanding number relationships helps students choose smarter, faster methods
✏️ Flexible mental strategies build confidence and accuracy with larger numbers
🧩 Mini Quiz – Quick Check
Try these after watching the video:
❓Question 1: I know 8+6=14. What is 18+6?
✅ Answer: 24
❓Question 2: Extend 9+7=16 to 90+70 = ?
✅ Answer: 160
❓Question 3: 600+600 came from which small fact?
✅ Answer: 6 + 6 =12 – Two Zeros added
❓Question 4: TRUE/FALSE: “If 5+8=13, then 50+80=130”
✅ Answer: TRUE – Same pattern + zeros!
❓Question 5: 20+70=90 came from which small fact?
✅ Answer: 2+7=9
Scored:
5/5 💯 = Champion!
3–4/5 🌟 = Great Work!
0–2/5 🔄 = Watch the video again!
📄 Sample Worksheet Preview
📥 Download Free Printable 6 Worksheet Pack
🎉 The preview above is just 1 sample.
Sign up with your email to receive the full pack of 6 worksheets.
📚 Other Lessons in This Unit
🚀 Learning Path (Recommended Order)
| Step | 🔗 Lesson | 💡 What You Learn |
|---|---|---|
| 1️⃣ | 🔢 Number Bonds and Partitioning – All ways to split a number | – Understand what partitioning numbers means and learn how number bonds work – Find all possible ways to split a number |
| 2️⃣ | ✏️Subtraction Using Addition Facts (Fact Families Explained) | -Use addition facts to solve subtraction problems quickly and efficiently (fact families) |
| 3️⃣ | 🧩 Extending Addition and Subtraction to Larger Numbers ⭐ You are here⭐ | – Use known number facts to solve larger, unfamiliar calculations efficiently |