Compare decimals to hundredths
Learning to compare decimals by size, not length, protects your child from a mistake that can linger for years: thinking 0.25 is bigger than 0.3 because it has more digits. It matters in real life, from comparing prices to reading race times. In 5th grade they compare decimals to the thousandths and round them, and in middle school the same sense of size carries into percents.
In this video, your child will learn to compare decimals to hundredths.
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
0.3 ? 0.6
Example 2
4.5 ? 4.45
Your child's turn
2.09 ? 2.1
The three key steps
- 1Compare the wholes first.
- 2Same? Compare after the point.
- 3More hundredths is greater.
Mistakes to listen for
- Thinking a decimal with more digits is bigger, so 0.25 seems greater than 0.3, as if comparing 25 and 3.
- Swinging to the opposite rule, that the shorter decimal always wins, and then saying 0.4 is greater than 0.45.
- Assuming 0.5 of a small pizza is more than 0.3 of a large one, forgetting the wholes are different sizes.
The lesson shows every step, so your child sees why it works. Read our parent's guide to comparing decimals like 0.09 and 0.1 →
Is your child ready to practice what they've learned?
Bobby's Math Club offers unlimited practice for free.
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More 4th 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 comparing decimals like 0.09 and 0.1, 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 comparing decimals like 0.09 and 0.1 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 comparing decimals like 0.09 and 0.1
Questions at your child's level, about five minutes a day, on comparing decimals like 0.09 and 0.1 and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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