🎓 Mathematiacal Modelling – Year 3 (ACARA Code : AC9M3N06)
🎯Focus:
📌 Solve real-life addition and subtraction word problems
📌 Use bar models to represent thinking
📌 Explain answers clearly
Key Ideas (Quick Guide)
- ⭐ Word problems tell a maths story
- ⭐ Bar models show relationships
- ⭐ Choose addition or subtraction carefully
- ⭐ Always explain your answer
🎥Video Lessons
💡 Video Tips:
- 👀 Look for keywords
- ✏️ Draw the bar model first
- ➕➖ Choose the operation
- 🗣️ Explain what each number means
🧩 Mini Quiz – Quick Check
Try these after watching the video:
❓Question 2: 140 − 58 = ?
✅ Answer: 82
❓Question 3: Which operation fits “how many more”?
✅ Answer: Subtraction
❓Question 4: What does this Bar Model represent?
┌─────────────┐
│ 45 │ 30 │
└─────────────┘
✅ Answer: 45 + 30 = 75
❓Question 5: A bar model has two parts: 18 and 24, and the total at the top is missing. What will be the number sentence for this bar model?
✅ Answer: 18 + 24 = 42
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
— ✏️ Addition and Subtraction Word Problems – Bar Models Explained
**You are here ✅**
— 🧩 Equal Sharing & Division Word Problems – Multiplication & Division Linked
**Next Lesson ➡️**
— 📚 Multiplication & Division Word Problems – Groups, Arrays & Sharing
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