Multiply decimals
Your child will reach for decimal multiplication whenever they need the cost of several things or a part of an amount. Three notebooks at $1.25 each, or half of a 1.5-liter bottle, are both decimal multiplication. It is the groundwork for percentages in 6th grade, where finding 25% of a price can mean multiplying by 0.25. You'll see it if you double a recipe or price 2.5 pounds of apples at the store.
In this video, your child will learn to multiply 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
2.8 × 3 = ?
Example 2
1.2 × 0.4 = ?
Your child's turn
3.6 × 0.7 = ?
The three key steps
- 1Split the decimal by place.
- 2Tenths × tenths = hundredths.
- 3Add, lining up the points.
Mistakes to listen for
- Writing 0.2 × 0.3 as 0.6 instead of 0.06, not seeing that two tenths of three tenths is six hundredths.
- Placing the decimal point without checking the size, so 6 × 0.25 comes out as 15 or 0.15 instead of 1.5.
- Multiplying only the whole numbers, so 2.5 × 4 becomes 8 instead of 10, with the 5 tenths left out.
The lesson shows every step, so your child sees why it works. Read our parent's guide to multiplying decimals to hundredths →
Is your child ready to practice what they've learned?
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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 multiplying decimals to hundredths, 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 multiplying decimals to hundredths 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 multiplying decimals to hundredths
Questions at your child's level, about five minutes a day, on multiplying decimals to hundredths and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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