Make teen numbers with ten and ones
This is your child's first step into place value: the 1 in 14 stands for ten, not one. In 1st grade they will treat ten ones as a single ten and work with numbers like 47 as tens and ones, and in 2nd grade with hundreds. Without this idea, adding 26 + 10 or carrying a ten later on can feel like a mystery.
In this video, your child will learn to make teen numbers with ten and ones.
The lesson stops at each question for your child's answer.
Three problems, each a little harder
Each problem is worked step by step. Your child will solve the last one before Bobby shows how.
Example 1
10 + 3 = ?
Example 2
16 = 10 + ?
Your child's turn
19 = 10 + ?
The three key steps
- 1A full ten frame is ten ones.
- 2Count the extra ones.
- 3Ten and the extra ones make the teen number.
Mistakes to listen for
- Thinking the 1 in 16 means one object, so they show 16 with 1 block and 6 blocks.
- Losing count while building the ten, so the group of ten ends up holding 9 or 11 objects.
- Writing 13 = 10 + 3 but not 10 + 3 = 13, or not linking the equation to the objects.
The lesson shows every step, so your child sees why it works. Read our parent's guide to teen numbers as ten and some more →
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Questions parents ask
Does my child need an account to watch?
No. You can watch this on any device at any time. If your child would like to practice teen numbers as ten and some more, and you'd like parent-friendly reports on your child's progress and growth, you can join Bobby's Math Club for unlimited free practice.
What happens when my child answers a question?
A right answer gets a cheer, and the lesson carries on. If your child isn't sure, they can tap "I don't know yet", and Bobby gives the answer and shows another example. Nothing is scored or stored.
Is this the same lesson that's on YouTube?
Yes. Here, the lesson stops at each question and waits for your child to answer. On YouTube, each question stays on screen for a few seconds, and then the lesson plays on.
Where can I learn more?
There's a short, kid-friendly lesson like this one for every Pre-K to 5th grade math skill, all in our video library. Our parent's guide to teen numbers as ten and some more has more on where kids get stuck and how you can help at home. In the club, your child practices at just the right level, about five minutes a day, and you get parent-friendly reports as they grow. Learn more about how it works →
Practice teen numbers as ten and some more
Questions at your child's level, about five minutes a day, on teen numbers as ten and some more and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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