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## 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

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# Number opposites

Learn what it means for a number to be the opposite of another number.

The opposite of a number is the number on the other side of 0 number line, and the same distance from 0.

Here are a couple of examples:

start color #e84d39, minus, 4, end color #e84d39 is the opposite of start color #1fab54, 4, end color #1fab54.

start color #1fab54, 3, end color #1fab54 is the opposite of start color #e84d39, minus, 3, end color #e84d39.

## Let's practice!

## Challenge problems

**Use the following number line for the questions below.**

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