To build a teen number, always fill a full ten first.
Step 1: Let's Learn
Read it, or press Listen and follow the words.
Why the ten comes first
A full ten is one thing you can see at a glance. Filling it first means you only have to count the leftovers.
Then add the rest
For seventeen, fill ten and then put seven more. The seven is the part you count.
Write it down
10 + 7 = 17. The sum shows exactly what you built, in the same order you built it.
Read the number back
Look at 17. The 1 is the full ten and the 7 is the leftovers. The numeral is a picture of the frames.
Step 2: Try It Yourself
Tap and try it out.
How many
10 and 7 make 17.
The full ten
Step 3: Watch an Example
One step at a time.
Watch Mia Build Seventeen
Mia is asked for seventeen counters.
- Step 1
She fills the whole first frame without counting past ten.
Step 4: Your Turn
Practice makes it stick.
The Sticker Sheet
Problem 1 of 1
A sheet of ten stickers and six loose ones. How many?
Build a Teen
1 of 4
10 + 4 = ?
2 of 4
10 + 8 = ?
3 of 4
10 + ? = 13
4 of 4
10 + ? = 19
Step 5: Quick Check
Show what you know.
Question 1 of 1
10 + 5 = ?
What You Learned
- Build a teen number by filling a ten first.
- Then add the extra ones.
- Write it as 10 plus the extras.