Count to 100 by tens
Counting by tens gives your child a shortcut through the numbers to 100. Ten, twenty, thirty is a short list with a big job, because it organizes everything in between. In 1st grade it helps your child find 10 more than a number and add numbers like 30 + 20, and later it helps with counting dimes and reading bigger numbers. It also makes counting a big pile of things much faster.
In this video, your child will learn to count to one hundred by tens.
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, 20, 30, ?
Example 2
40, 50, ?, 70
Your child's turn
70, 80, 90, ?
The two key steps
- 1Each number is ten more.
- 2Count by tens all the way to one hundred!
Mistakes to listen for
- Counting by tens past ninety to "ten-ty," not yet knowing that one hundred comes after 90.
- Mixing up words that sound alike, such as saying fifteen for fifty or sixteen for sixty while counting by tens.
- Sliding back into counting by ones partway, so 10, 20, 30 turns into 31, 32, 33.
The lesson shows every step, so your child sees why it works. Read our parent's guide to counting to 100 by tens →
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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 counting to 100 by tens, 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 counting to 100 by tens 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 counting to 100 by tens
Questions at your child's level, about five minutes a day, on counting to 100 by tens and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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