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

Long Multiplication

Introduction

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