Pre-algebra Online Course, Khan Academy http://freevideolectures.com Lecture 1: Adding/Subtracting negative numbers http://freevideolectures.com/Course/2562/Pre-algebra/1 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 2: Multiplying and dividing negative numbers http://freevideolectures.com/Course/2562/Pre-algebra/2 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 3: Adding and subtracting fractions http://freevideolectures.com/Course/2562/Pre-algebra/3 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 4: Multiplying fractions http://freevideolectures.com/Course/2562/Pre-algebra/4 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 5: Dividing fractions http://freevideolectures.com/Course/2562/Pre-algebra/5 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 6: Introduction to Order of Operations http://freevideolectures.com/Course/2562/Pre-algebra/6 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 7: More Complicated Order of Operations Example http://freevideolectures.com/Course/2562/Pre-algebra/7 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 8: Level 1 Exponents http://freevideolectures.com/Course/2562/Pre-algebra/8 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 9: Level 2 Exponents http://freevideolectures.com/Course/2562/Pre-algebra/9 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 10: Level 3 exponents http://freevideolectures.com/Course/2562/Pre-algebra/10 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 11: Negative Exponent Intuition http://freevideolectures.com/Course/2562/Pre-algebra/11 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 12: Exponent Rules Part 1 http://freevideolectures.com/Course/2562/Pre-algebra/12 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 13: Exponent Rules Part 2 http://freevideolectures.com/Course/2562/Pre-algebra/13 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 14: Simplifying radicals http://freevideolectures.com/Course/2562/Pre-algebra/14 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 15: Introduction to Logarithms http://freevideolectures.com/Course/2562/Pre-algebra/15 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 16: Unit conversion http://freevideolectures.com/Course/2562/Pre-algebra/16 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 17: Speed translation http://freevideolectures.com/Course/2562/Pre-algebra/17 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 18: Introduction to logarithm properties http://freevideolectures.com/Course/2562/Pre-algebra/18 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 19: Introduction to logarithm properties (part 2) http://freevideolectures.com/Course/2562/Pre-algebra/19 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 20: Scientific Notation http://freevideolectures.com/Course/2562/Pre-algebra/20 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 21: Scientific Notation Examples http://freevideolectures.com/Course/2562/Pre-algebra/21 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 22: Introduction to Ratios (new HD version) http://freevideolectures.com/Course/2562/Pre-algebra/22 Sun, 10 Oct 2010 00:00:00 -0600 Lecture 23: Unit Conversion Example: Drug Dosage http://freevideolectures.com/Course/2562/Pre-algebra/23 Sun, 10 Oct 2010 00:00:00 -0600