The number line was first used in 1685 by John Wallis. He described addition and subtraction as a man walking forwards and backwards on the number line.

How can you use the number line to understand multiplication? Watch this video to find out!

How to Use the Number Line for Multiplication

Practice multiplication using the number line on the next page.

A line with numbers going on forever in both directions from 0.

Mathagon

Multiplication Terms

Turn Sums into Multiplication

Multiply by 0

Simplifying Sums

Number Line for Multiplication

Swap Factors

Factor Swapping

Multiplication is used in all aspects of math. Watch this video to learn more.

Go to the next page to learn what multiplication is.

Learn how to define multiplication, how multiplication and addition are related, if order matters in multiplication and why multiplication by 0 is 0.

What Is Multiplication?

What Are the Different Parts of a Multiplication Problem Called? 

\text{factor} \times \text{factor} = \text{product}

The different parts of a multiplication expression have different names. This video shows you what they are called.

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What Are the Different Parts of a Multiplication Problem Called?

You can use multiplication when you add a number to itself repeatedly. Watch this!

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How to Turn Sums into Multiplication

What happens when you multiply a number by 0? Watch this video to find out!

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How to Multiply by 0

How to Simplify Sums Using Multiplication

You learned that repeated addition can be rewritten using multiplication. But what if the numbers in a sum are not all equal? Can you still use multiplication? The answer is yes!

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You can use the number line to help you understand what happens when performing multiplication, and as a tool to help you in problems. This video shows how.

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Why Can You Swap the Factors and Get the Same Result?

The order of the factors does not matter. Watch this video to find out why this is important.

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When solving multiplication problems you can swap the factors and get the same result. Watch this video to learn more.

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