🎓 Algorithm & Patterns – Year 3 (ACARA Code : AC9M3N07)
🎯Focus:
🧠 use a simple algorithm to find multiples of 3
🔢 follow step-by-step instructions to solve problems
🔍 recognise patterns in multiples of 3
✏️ explain how doubling + adding helps build answers
🚀 apply multiplication in fun number challenges
Key Ideas (Quick Guide)
- ⭐ The Secret Rule (Algorithm)
💡 To multiply by 3: Double the number, then add one more of the same number!
| 🪄 Step | 🔢 What to do |
|---|---|
| 1 | Start with your number |
| 2 | Double it |
| 3 | Add the original number again |
| 4 | That’s your answer! 🎉 |
🎥Video Lessons
💡 Video Tips:
✏️ Practice doubling small numbers (like 2, 3, 4)
👂 Say skip-counting by 3 out loud
🔍 Look for patterns in numbers around you
🛑 Pause and try each step yourself
🔢 Follow the algorithm slowly
🧩 Mini Quiz – Quick Check
Try these after watching the video:
❓Question 2: What is double 5?
✅ Answer: 10
❓Question 3: Add one more 5 to 10. What do you get?
✅ Answer: 15
❓Question 4: What is 3 × 6?
✅ Answer: 18
❓Question 5: Which pattern shows multiples of 3?
✅ Answer: 3, 6, 9, 12
Scored:
5/5 💯 = Champion!
3–4/5 🌟 = Great Work!
0–2/5 🔄 = Watch the video again!
📄 Sample Worksheet Preview
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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 ⭐ You are here⭐ | 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) | Sort coins and calculate totals using multiplication |
Previous Lesson: ⬅️ Divisibility Rules for 2, 5 and 10 | How to Identify Multiples Fast (Easy Math Tricks for Kids)
Next Lesson: ➡️ How to Count 5c and 10c Coins Fast | Money Math for Kids (Multiples of 5 and 10)