🎓 Algorithm & Patterns – Year 3 (ACARA Code : AC9M3N07)
🎯Focus:
🪙 sort 5c and 10c coins using a step-by-step algorithm
🧠 calculate total value using multiplication and addition
🔍 recognise patterns in coin values (multiples of 5 and 10)
💰 solve real-life money problems using coins
✏️ explain how sorting makes counting faster and easier
Key Ideas (Quick Guide)
- 🪙 What is a Sorting Algorithm?
💡 A sorting algorithm is a step-by-step method to organise things so they are easier to understand.
| 🪙 Coins | 🔢 Pattern |
|---|---|
| 5c coins | Always multiples of 5 |
| 10c coins | Always multiples of 10 |
| Combined total | Always build from patterns of 5 and 10 |
🎥Video Lessons
💡 Video Tips:
🪙 Look at different coins (5c and 10c)
🔢 Practise counting in 5s and 10s
🧠 Think: “How could I group these quickly?”
🛑 Pause when coins are sorted
🧮 Try counting each group yourself
🔍 Watch how multiplication helps calculate total value
🧩 Mini Quiz – Quick Check
Try these after watching the video:
❓Question 2: What is 4 × 10?
✅ Answer: 40
❓Question 3: What is 3 × 5?
✅ Answer: 15
❓Question 4: Why do we sort coins?
✅ Answer: To make counting easier and faster
❓Question 5: Total: 5 five-cent coins + 2 ten-cent coins = ?
✅ Answer: 45 cents
Scored:
5/5 💯 = Champion!
3–4/5 🌟 = Great Work!
0–2/5 🔄 = Watch the video again!
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📚 Other Lessons in This Unit
🚀 Learning Path (Recommended Order)
| Step | 🔗 Lesson | 💡 What You Learn |
|---|---|---|
| 1️⃣ | 🧠 Doubling and Halving Number Patterns Explained | Easy Math Algorithms for Kids | Learn how numbers grow and shrink using doubling and halving rules |
| 2️⃣ | 📝 Divisibility Rules for 2, 5 and 10 | How to Identify Multiples Fast (Easy Math Tricks for Kids) | Spot number patterns and quickly identify multiples |
| 3️⃣ | 💡Multiply by 3 Trick: Double and Add Method | Easy Mental Math Strategy for Kids | Use a step-by-step rule to multiply by 3 easily |
| 4️⃣ | 🪙How to Count 5c and 10c Coins Fast | Money Math for Kids (Multiples of 5 and 10) ⭐ You are here⭐ | Sort coins and calculate totals using multiplication |
Previous Lesson: ⬅️ Multiply by 3 Trick: Double and Add Method | Easy Mental Math Strategy for Kids