Multiply two two-digit numbers
This is where your child’s times tables go to work on bigger pairs, like 38 rows of 64 seats or a room 12 feet by 14. Next year it supports dividing by two-digit numbers, and in algebra the same splitting into parts is used to multiply expressions with letters in them. At home, it is how you would price 12 pizzas at $15 each.
In this video, your child will learn to multiply two two-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
21 × 13 = ?
Example 2
64 × 38 = ?
Your child's turn
47 × 56 = ?
The three key steps
- 1Split both numbers by place.
- 2Multiply part by part.
- 3Add all the boxes.
Mistakes to listen for
- Multiplying only the matching places, so 64 × 38 becomes 1,800 + 32 = 1,832, missing 60 × 8 and 4 × 30.
- Treating tens as ones inside a part, writing 60 × 30 as 180 instead of 1,800.
- Getting each part right but adding them wrongly, such as lining up 1,800, 480, 120, and 32 by their left edges.
The lesson shows every step, so your child sees why it works. Read our parent's guide to multiplying two two-digit numbers →
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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 multiplying two two-digit numbers, 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 two two-digit numbers 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 two two-digit numbers
Questions at your child's level, about five minutes a day, on multiplying two two-digit numbers and whatever PK-5 skills they need to develop. Unlimited practice, free forever.
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