# Algebra foundations

This course is a part of
**Algebra I**, a 21-course Topic series from Khan Academy.

This topic is an overview of the fundamental ideas and tools of algebra.

This course contains 10 segments:

**Overview and history of algebra**

Did you realize that the word "algebra" comes from Arabic (just like "algorithm" and "al jazeera" and "Aladdin")? And what is so great about algebra anyway? This tutorial doesn't explore algebra so much as it introduces the history and ideas that underpin it.

**Introduction to variables**

Wait, why are we using letters in math? How can an 'x' represent a number? What number is it? This tutorial is great if you're just beginning to delve into the world of variables and expressions.

**Substitution and evaluating expressions**

Learn how to substitute (or "plug in") values for variables and evaluate algebraic expressions.

**Evaluating expressions word problems**

Learn how to plug in values to evaluate real-world expressions.

**Writing algebraic expressions introduction**

Learn the basics of writing expressions with variables.

**Dependent & independent variables**

Sometimes one variable depends on another. For example, the amount of money you make might depend on how many hours you work.

**Combining like terms**

Learn how to combine like terms (with negative numbers and variables), including more complex problems involving the distributive property.

**Introduction to equivalent algebraic expressions**

Learn to tell whether or not two algebraic expressions are equivalent by combining like terms and using the distributive property.

**Interpreting linear expressions**

Any expression (mathematical or otherwise) has meaning. Help us match the linear expression to the meaning options given. In some cases, more than one meaning may apply.

**Division by zero**

Sal uses algebraic reasoning to tackle the problems of dividing by zero.

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Rating | Not enough ratings |
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Length | 10 segments |

Starts | On Demand (Start anytime) |

Cost | Free |

From | Khan Academy |

Download Videos | On all desktop and mobile devices |

Language | English |

Subjects | Mathematics |

Tags | Math Algebra I |

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Rating | Not enough ratings |
---|---|

Length | 10 segments |

Starts | On Demand (Start anytime) |

Cost | Free |

From | Khan Academy |

Download Videos | On all desktop and mobile devices |

Language | English |

Subjects | Mathematics |

Tags | Math Algebra I |

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