Round decimals
Rounding gives your child the power to estimate, and estimating is how they will catch their own mistakes. It means knowing $3.459 a gallon is about $3.46, or that 4.68 + 2.1 should be close to 7. Your child will lean on that habit to check decimal answers this year and in middle school, where measurement, money, and percentages all come with digits past the decimal point.
In this video, your child will learn to round decimals to any place.
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 12.342 to the nearest hundredth.
Example 2
Round 18.5 to the nearest whole number.
Your child's turn
Round 5.345 to the nearest tenth.
The three key steps
- 1Find the two it's between.
- 2Round to the closer one.
- 3Exactly halfway? Round up.
Mistakes to listen for
- Rounding to the wrong place, giving 5 or 4.68 for 4.68 to the nearest tenth instead of 4.7.
- Stumbling when rounding carries over, writing 2.10 or 2.9 for 2.97 to the nearest tenth instead of 3.0.
- Looking at every digit to the right, so the final 9 in 3.149 makes them round up to 3.2 instead of 3.1.
The lesson shows every step, so your child sees why it works. Read our parent's guide to rounding decimals, like 4.68 to 4.7 →
Is your child ready to practice what they've learned?
Bobby's Math Club offers unlimited practice for free.
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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 rounding decimals, like 4.68 to 4.7, 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 decimals, like 4.68 to 4.7 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 decimals, like 4.68 to 4.7
Questions at your child's level, about five minutes a day, on rounding decimals, like 4.68 to 4.7 and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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