Sixteen, seventeen, eighteen, nineteen, twenty. The last of the teen numbers.
Step 1: Let's Learn
Read it, or press Listen and follow the words.
Listen for the number
One full frame is ten. Count what is in the second frame. Six. Ten and six. Say it: six-teen. The six is in the name.
You can hear the number
Sixteen has six in it. Seventeen has seven. Once you notice that, you do not have to memorize them separately.
Step 2: Try It Yourself
Tap and try it out.
How many
2 more would make 20.
Step 3: In Real Life
A box of crayons
A big crayon box holds twenty. Count them back in. Sixteen, seventeen, eighteen, nineteen, twenty. None are missing.
Step 4: Watch an Example
One step at a time.
Watch Mia Fill Both Frames
Mia counts to twenty with counters.
- Step 1
She fills the first frame: ten.
Step 5: Your Turn
Practice makes it stick.
The Beads
Problem 1 of 1
Seventeen beads on a string. How many beads?
Up to Twenty
1 of 4
What comes after fifteen?
2 of 4
What comes after eighteen?
3 of 4
What comes after nineteen?
4 of 4
Ten and ten is?
Make Eighteen
Fill the boxes.
Fill eighteen boxes.
How many
Step 6: Quick Check
Show what you know.
Question 1 of 1
Ten and eight more is?
What You Learned
- Sixteen through twenty finish the teens.
- You can hear the number inside sixteen and seventeen.
- Twenty is two full ten frames.
For the grown-up
Six-teen is six and ten. The word itself is telling you how it is built.
Two tens make twenty. Both frames completely full, nothing spilling over.
After twenty comes twenty-one, twenty-two. The ones repeat, with a new ten in front. That pattern never stops.