Computers use other algorithms than long multiplication when doing multiplication problems. They are much faster when dealing with really big numbers.

Moving a digit to the left, from one place-value column to another.

Every number in a multiplication problem that is multiplied is called a factor.

The result of multiplying numbers together.

Mathagon

Long Multiplication 

Carrying Digits

2-digit Numbers

3-digit Numbers

Decimal Numbers

Lattice Multiplication with Integers

Lattice Multiplication with Decimal Numbers

Mental Arithmetic

You do not need to memorize multiplication problems that aren't covered in the times tables. Watch this video to find out why!

Long multiplication and the times tables are the tools you need to solve all multiplication problems!

Learn how to do the long multiplication method and how it works. Learn how lattice multiplication works and how to do mental math fast using the times tables.

Long Multiplication

How to Do Long Multiplication with 3-digit Numbers

It's time to take it one step further: 3-digit numbers! Watch this video to see how long multiplication with 3-digit numbers work.

Solve math problems, activities and exercises related to "How to Do Long Multiplication with 3-digit Numbers".