A double is two groups of the same size. 3 and 3 is a double.
Step 1: Let's Learn
Read it, or press Listen and follow the words.
Doubles look even
A double always looks balanced. That makes it easy to remember.
4 and 4 makes 8.
First part
Second part
Why doubles stick so well
Both parts are the same, so there is only one number to remember instead of two. That is why they arrive faster than other facts.
Doubles are always even
Anything split into two equal groups can be shared fairly. That is exactly what even means.
Step 2: Try It Yourself
Keep both trays the same to make a double.
3 and 3 makes 6.
Step 3: Watch an Example
One step at a time.
Watch Ana Use a Double
Ana works out 5 + 5.
- Step 1
She sees both parts are the same. It is a double.
Step 4: Your Turn
Practice makes it stick.
Two Hands
Problem 1 of 1
Ben holds up 4 fingers on each hand. How many fingers is that?
Know Your Doubles
Try to answer without counting.
1 of 3
2 + 2 = ?
2 of 3
3 + 3 = ?
3 of 3
5 + 5 = ?
Step 5: Quick Check
Show what you know.
Question 1 of 2
4 + 4 = ?
Question 2 of 2
1 + 1 = ?
What You Learned
- A double is two groups the same size.
- Doubles look balanced.
- Doubles are worth knowing by heart.