Find the number that makes 10
The pairs that make 10 are some of the most useful facts your child will ever learn, because our numbers are built in tens. In 1st grade they use them to add quickly: for 8 + 5, they know 8 needs 2 to make 10, so 8 + 5 is 10 + 3, or 13. Later the same idea helps with making 100 in 2nd grade, with counting change, and with everyday mental math.
In this video, your child will learn to find the number that makes ten.
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
7 + ? = 10
Example 2
4 + ? = 10
Your child's turn
3 + ? = 10
The two key steps
- 1Put the dots in a ten frame, and count the empty boxes.
- 2That's the number that makes ten!
Mistakes to listen for
- Including the starting number when counting up, so for 6 they say "6, 7, 8, 9, 10" and answer 5, not 4.
- Knowing that 5 and 5 make 10 but guessing for other numbers, such as saying 8 needs 3 more.
- Answering with 10 itself, or with the starting number, because they are unsure what "how many more" asks.
The lesson shows every step, so your child sees why it works. Read our parent's guide to finding the number that makes 10 →
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More Kindergarten Problem Solving, with questions your child answers along the way.
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 finding the number that makes 10, 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 finding the number that makes 10 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 finding the number that makes 10
Questions at your child's level, about five minutes a day, on finding the number that makes 10 and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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