# Pre-Algebra

Videos on pre-algebra. Should be ready for the "Algebra" playlist if you understand everything here.

Salman Khan

• ##### Adding and Subtracting Fractions
Salman Khan

How to add and subtract fractions.

• ##### Multiplying Fractions
Salman Khan

Multiplying fractions.

• ##### Dividing Fractions
Salman Khan

Dividing fractions.

• ##### Introduction to Order of Operations
Salman Khan

Order of Operations.

• ##### More Complicated Order of Operations
Salman Khan

More Complicated Order of Operations Example.

• ##### Level 1 Exponents
Salman Khan

Basic Exponents.

• ##### Level 2 Exponents
Salman Khan

Negative Exponents.

• ##### Level 3 Exponents
Salman Khan

Fractional Exponents.

• ##### Negative Exponent Intuition
Salman Khan

Intuition on why a^-b = 1/(a^b) (and why a^0 =1).

• ##### Exponent Rules Part 1
Salman Khan

Introduction to Exponent Rules.

• ##### Exponent Rules Part 2
Salman Khan

2 More Exponent Rules with an Introduction to Composite Problems.

Salman Khan

Using Exponent Rules to Simplify Radicals or Square Roots.

• ##### Introduction to Logarithms
Salman Khan

An Introduction to Logarithms.

• ##### Unit Conversion
Salman Khan

Metric Unit Conversion.

• ##### Speed Translation
Salman Khan

Translating Speed Units.

• ##### Introduction to Logarithm Properties
Salman Khan

Introduction to the First Two Logarithm Properties.

• ##### Scientific Notation
Salman Khan

Introduction to Scientific Notation.

• ##### Scientific Notation Examples
Salman Khan

More Scientific Notation Examples.

• ##### Unit Conversion Example: Drug Dosage
Salman Khan

Unit Conversion Example: Drug Dosage.