Main content

## Algebra basics (ASL)

### Course: Algebra basics (ASL) > Unit 1

Lesson 1: Negative numbers (ASL)- Intro to negative numbers
- Negative numbers on the number line
- Number opposites
- Number opposites
- Adding numbers with different signs
- Adding negative numbers
- Adding & subtracting negative numbers
- Subtracting a negative = adding a positive
- Subtracting negative numbers
- Multiplying positive & negative numbers
- Why a negative times a negative is a positive
- Why a negative times a negative makes sense
- Dividing positive and negative numbers
- Multiplying negative numbers
- Dividing negative numbers

© 2023 Khan AcademyTerms of usePrivacy PolicyCookie Notice

# Intro to negative numbers

Learn what negative numbers are and how to plot them on the number line.

Here's a number line that should look very familiar. It starts at 0, then counts up by 1 from there:

We know that if we were to keep going to the right, we would have 11, then 12, and so on.

What happens if we keep going to the left of 0 though? We get negative numbers! To the left of 0 is minus, 1, then minus, 2, then minus, 3, and so on:

## Let's practice!

## Why do we need negative numbers?

Negative numbers help us describe values less than zero.

### Example:

When the temperature is 8, degrees below 0, degrees, it is less than 0. We can say the temperature is minus, 8, degrees.

### A few more negative situations

## Want to join the conversation?

No posts yet.