Related addition facts

Key notes:-

🌟 Topic: Related Addition Facts

🧮 What Are Related Addition Facts?

Related addition facts are number sentences that use the same numbers to make different addition facts.
👉 Example:

  • 2 + 3 = 5
  • 3 + 2 = 5

🎯 Both have the same numbers (2, 3, and 5) but are in a different order.

🔄 Order Doesn’t Change the Sum

When we switch the order of the addends, the sum stays the same! 💡
👉 Example:

  • 4 + 1 = 5
  • 1 + 4 = 5

✨ This is called the Commutative Property of Addition.

💖 Addends and Sum

The numbers we add are called addends ➕

The answer we get is called the sum 🎯
👉 Example: 5 + 2 = 7

  • 5 and 2 are addends
  • 7 is the sum

🧠 How Related Facts Help Us

  • They help us remember addition facts easily 🎓
  • They show us that numbers can be added in any order 🔢
  • They make mental math faster ⚡

🎲 Practice Examples

  • 6 + 3 = 9 and 3 + 6 = 9 🧩
  • 1 + 8 = 9 and 8 + 1 = 9 🌼
  • 5 + 4 = 9 and 4 + 5 = 9 🍎

🌈 Fun Tip

💬 “Flip the numbers — the answer stays the same!”
(2 + 7 = 9 and 7 + 2 = 9 🎉)

🏁 Summary

✅ Related addition facts show that order doesn’t change the sum.
✅ They use the same numbers in different orders.
✅ They help us add quickly and correctly!

Learn with an example

🎤 Which is the related addition fact for 3 + 1 = 4?

  • 3 + 4 = 7
  • 1 + 4 = 5
  • 1 + 3 = 4
  • 4 + 1 = 5
  • This is an addition fact.
  • 3 + 1 = 4
  • This is the related fact.
  • 1 + 3 = 4
  • Notice how the 3 and the 1 changed places.

🎤 Which is the related addition fact for 7 + 0 = 7?

  • 0 + 0 = 0
  • 2 + 7 = 9
  • 1 + 7 = 8
  • 0 + 7 = 7
  • This is an addition fact.
  • 7 + 0 = 7
  • This is the related fact.
  • 0 + 7 = 7
  • Notice how the 7 and the 0 changed places.

🎤 Which is the related addition fact for 2 + 7 = 9?

  • 8 + 2 = 10
  • 7 + 3 = 10
  • 7 + 1 = 8
  • 7 + 2 = 9
  • This is an addition fact.
  • 2 + 7 = 9
  • This is the related fact.
  • 7 + 2 = 9
  • Notice how the 2 and the 7 changed places.

Let’s practice!