Understanding Near Doubles: An Easy Second Grade Math Guide

📚 Understanding Near Doubles

Near doubles are addition problems where the two numbers being added are close to each other. Instead of adding two completely different numbers, you're adding numbers that are only one apart. This makes the calculation simpler by relating it to a known doubles fact.

📜 History and Background

The concept of using near doubles likely emerged as children began to understand the relationship between numbers and look for easier ways to add. It builds on the foundational understanding of doubles (like 2+2, 5+5, 10+10) which are often among the first addition facts children memorize.

🔢 Key Principles of Near Doubles

• 🍎 Identify the Near Double: Recognize that the two addends are only one number apart (e.g., 6 + 7).
• ➕ Use the Doubles Fact: Relate the near double to a doubles fact. For 6 + 7, think of 6 + 6.
• ✨ Adjust the Sum: Since you used a doubles fact, adjust the sum by adding one more. For 6 + 7, you did 6 + 6 = 12, so add 1 to get 13.

➕ Real-World Examples

Let's break down some examples:

Example 1: 5 + 6

• 🤝 Doubles Fact: Think of 5 + 5 = 10
• ✅ Adjust: Add 1 to the result: 10 + 1 = 11
• ✔️ Therefore: 5 + 6 = 11

Example 2: 8 + 9

• 🤝 Doubles Fact: Think of 8 + 8 = 16
• ✅ Adjust: Add 1 to the result: 16 + 1 = 17
• ✔️ Therefore: 8 + 9 = 17

➕ Practice Quiz

Solve these near doubles problems:

1. 6 + 7 = ?
2. 9 + 10 = ?
3. 7 + 8 = ?
4. 4 + 5 = ?
5. 10 + 11 = ?
6. 11 + 12 = ?
7. 12 + 13 = ?

💡 Tips and Tricks

• 🧮 Always relate the near double to the smaller number's doubles fact.
• ✍️ Practice regularly to become quick at recognizing and solving these problems.
• ➕ Remember, you're always adding 1 to the doubles fact!

✔️ Conclusion

Understanding near doubles is a fantastic way to make addition easier and faster. By relating these problems to doubles facts, you can quickly find the answer. Keep practicing, and you'll become a near doubles expert in no time!