Every teen number is one full ten and some more.
Step 1: Let's Learn
Read it, or press Listen and follow the words.
Thirteen
Thirteen is ten and three. One full frame and three left over in the next one.
This is the big idea
Everything about bigger numbers is built on it. Twenty-three is two tens and three. Hundreds work the same way.
The ten is hidden in the name
You cannot hear the ten in "thirteen" as clearly as you can see it in a frame. The frame is more honest than the word.
Always exactly one ten
Every teen number has one ten, never two. That is what makes them teens. At twenty you get a second ten.
Step 2: Try It Yourself
Fill the first frame completely before starting the second.
How many
6 more would make 20.
Step 3: Watch an Example
One step at a time.
Watch Mia Build Sixteen
Mia builds sixteen with counters.
- Step 1
She fills the first frame completely: ten.
Step 4: Your Turn
Practice makes it stick.
The Pencils
Problem 1 of 1
Fifteen pencils. Ten in a box, rest loose. How many loose?
Ten and Some More
1 of 4
12 is 10 and how many?
2 of 4
17 is 10 and how many?
3 of 4
10 and 9 is?
4 of 4
10 and 0 is?
Step 5: Quick Check
Show what you know.
Question 1 of 1
18 is 10 and how many?
What You Learned
- Every teen number is ten and some more.
- Fill one frame completely, then count the extras.
- This is the idea all bigger numbers are built on.