Add three numbers – use doubles

Key notes:-

💡 What are “Doubles”?

Doubles are two numbers that are the same.

Example:

  • 2 + 2 = 4
  • 5 + 5 = 10

🔍 Why Use Doubles to Add 3 Numbers?

  • It makes addition easier and faster.
  • When you see two numbers that are the same, add them first!
    ✔ Helps you remember facts quickly
    ✔ Makes adding three numbers simpler

🔢 Look for Doubles First 🕵️‍♂️

Example: 3 + 3 + 2

  • Step 1: Add the doubles → 3 + 3 = 6
  • Step 2: Add the last number → 6 + 2 = 8

🎯 Sometimes Rearranging Helps

You can change the order of numbers to find the doubles.
Example: 4 + 1 + 4

  • Rearrange → 4 + 4 + 1
  • Add doubles → 4 + 4 = 8
  • Add the last number → 8 + 1 = 9

🧠 Doubles Facts to Remember

  • 1 + 1 = 2
  • 2 + 2 = 4
  • 3 + 3 = 6
  • 4 + 4 = 8
  • 5 + 5 = 10
  • 6 + 6 = 12
    (These help in solving quickly! 😊)

🎉 Try Solving Examples

  • 2 + 2 + 3 = ?
  • 5 + 1 + 5 = ?
  • 3 + 4 + 3 = ?

🌈 Key Idea

👉 Find doubles → Add them → Then add the leftover number.
This makes adding three numbers fun and easy! 🎈😄

Learn with an example

✒️Add: 1 + 3 + 3 =

Hint: Start by adding a double.

First, add the doubles 3 and 3 to make 6:

1 + 3 + 3 = ?

1 + 6 = ?

Now add 1 and 6:

1 + 6 = 7

The sum is 7.

✒️Add: 5 + 2 + 2 =

Hint: Start by adding a double.

First, add the doubles 2 and 2 to make 4:

5 + 2 + 2 = ?

5 + 4 = ?

Now add 5 and 4:

5 + 4 = 9

The sum is 9.

✒️Add: 1 + 1 + 2 =

Hint: Start by adding a double.

First, add the doubles 1 and 1 to make 2:

1 + 1 + 2 = ?

2 + 2 = ?

Now add 2 and 2:

2 + 2 = 4

The sum is 4.

Let’s practice!