# Course - Pre Algebra

Course Level: Elementary

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

• Lecture 1 - Adding:Subtracting Negative Numbers
• Lecture 2 - Multiplying and dividing negative numbers
• Lecture 3 - Adding and subtracting fractions
• Lecture 4 - Multiplying fractions
• Lecture 5 - Dividing fractions
• Lecture 6 - Introduction to Order of Operations
• Lecture 7 - More Complicated Order of Operations Example
• Lecture 8 - Level 1 Exponents
• Lecture 9 - Level 2 Exponents
• Lecture 10 - Level 3 exponents
• Lecture 11 - Negative Exponent Intuition
• Lecture 12 - Exponent Rules Part 1
• Lecture 13 - Exponent Rules Part 2
• Lecture 14 - Simplifying radicals
• Lecture 15 - Introduction to Logarithms
• Lecture 16 - Unit conversion
• Lecture 17 - Speed translation
• Lecture 18 - Introduction to logarithm properties
• Lecture 19 - Introduction to logarithm properties (part 2)
• Lecture 20 - Scientific Notation
• Lecture 21 - Scientific Notation Examples
• Lecture 22 - Introduction to Ratios (new HD version)
• Lecture 23 - Unit Conversion Example; Drug Dosage