Count to 100 by ones
Counting to 100 gives your child their first map of the numbers they will use for years to come. After the teens, each new ten follows the same pattern, so 41 to 49 sounds a lot like 21 to 29. Noticing that pattern is what keeps your child going, and in 1st grade they count on past 100 to 120. You'll hear it in hide-and-seek, in counting the days to a birthday, and in counting pennies in a jar.
In this video, your child will learn to count to one hundred by 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
23, 24, 25, ?
Example 2
37, 38, 39, ?
Your child's turn
97, 98, 99, ?
The three key steps
- 1Each number is one more.
- 2After a nine comes the next ten.
- 3After ninety-nine comes one hundred.
Mistakes to listen for
- Getting stuck at the end of a ten, saying "twenty-nine, twenty-ten" instead of thirty.
- Skipping a number partway through a ten, such as going from 56 straight to 58, without noticing the gap.
- Saying "fiveteen" for fifteen or "threeteen" for thirteen, since those teen words don't sound like the numbers they come from.
The lesson shows every step, so your child sees why it works. Read our parent's guide to counting to 100 by ones →
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More Kindergarten Numbers & Place Value, 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 counting to 100 by ones, 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 ones 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 ones
Questions at your child's level, about five minutes a day, on counting to 100 by ones and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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