If you're seeing this message, it means we're having trouble loading external resources for Khan Academy.
If you're behind a web filter, please make sure that the domains
*.kastatic.org and *.kasandbox.org are unblocked.
You know your multiplication tables (and basic division) from the 3rd grade and are ready to learn how to multiply and divide multi-digit numbers. Imagine the possibilities! This tutorial will make you unstoppable. Common Core Standard: 4.NBT.B.5
Let's start by solving a basic multiplication problem. No carrying of numbers in this example!
How about this example? We're going to multiply a 3 digit number by a 1 digit number. Again, no carrying involved.
Multiply 2- or 3-digit numbers by 1-digit numbers. No carrying.
We use something called the standard method which involves writing the larger of the two numbers on top. Watch.
We're carrying numbers in this example. Everyone needs a hand now and then, right?
This is getting fun! We're now multiplying FOUR digits times one digit. Remember to carry!
Multiply 3 or 4 digits by 1-digit with carrying.
When multiplying, it can be helpful to break numbers into parts.
Multiply a one-digit number by up to a four-digit number by decomposing the larger number.
The trick here to remember your place value as you multiply and then add the numbers. We'll demonstrate and make it perfectly clear!
Multiply 2 digits by 2 digits with carrying.