Round to the nearest 10 or 100
Rounding gives your child a quick way to check their own answers, a habit that lasts for years. Knowing that 347 + 198 should be close to 350 + 200 helps them catch a total that comes out far too big or too small. Rounding stretches to thousands in 4th grade and to decimals in 5th, and it is handy in daily life, such as guessing a shopping total at the store.
In this video, your child will learn to round to the nearest ten or hundred.
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
Round 45 to the nearest ten.
Example 2
Round 328 to the nearest hundred.
Your child's turn
Round 645 to the nearest hundred.
The three key steps
- 1Find the two it's between.
- 2Round to the closer one.
- 3Exactly halfway? Round up.
Mistakes to listen for
- Looking at the wrong digit, such as checking the 7 when rounding 347 to the nearest hundred and getting 400.
- Changing the rounded digit but keeping the digits after it, so 347 rounded to the nearest ten becomes 357.
- Rounding every number that ends in 5 down, such as 65 to 60, unsure which way the halfway point goes.
The lesson shows every step, so your child sees why it works. Read our parent's guide to rounding to the nearest 10 or 100 →
Is your child ready to practice what they've learned?
Bobby's Math Club offers unlimited practice for free.
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More 3rd grade 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 rounding to the nearest 10 or 100, 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 rounding to the nearest 10 or 100 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 rounding to the nearest 10 or 100
Questions at your child's level, about five minutes a day, on rounding to the nearest 10 or 100 and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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