Multiply multi-digit numbers
Confidence with big multiplication frees your child to focus on the harder thinking ahead. Dividing by two-digit numbers, multiplying decimals, and finding volume all lean on it this year, and in middle school it sits underneath ratios, percentages, and area problems. A child who still has to fight through 24 × 36 often loses the thread of the bigger problem it was part of.
In this video, your child will learn to multiply multi-digit numbers.
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
32 × 21 = ?
Example 2
46 × 37 = ?
Your child's turn
125 × 34 = ?
The three key steps
- 1Multiply by the ones first.
- 2Zero first, then the tens digit.
- 3Add the two rows.
Mistakes to listen for
- Forgetting the placeholder zero, so 213 × 32 becomes 426 + 639 = 1,065 instead of 6,816.
- Mixing up the small carried digits, adding one from multiplying by 2 into the row for multiplying by 30.
- Misaligning the columns of partial products, so tens sit under hundreds and the total is far off.
The lesson shows every step, so your child sees why it works. Read our parent's guide to multiplying big numbers, like 213 × 32 →
Is your child ready to practice what they've learned?
Bobby's Math Club offers unlimited practice for free.
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More 5th 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 multiplying big numbers, like 213 × 32, 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 big numbers, like 213 × 32 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 big numbers, like 213 × 32
Questions at your child's level, about five minutes a day, on multiplying big numbers, like 213 × 32 and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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