Math Basics - by Gcflearnfree Number of Lessons: 8 Course Duration (hh:mm:ss): 0:19:57 Math Basics: Addition (0:2:41) Math Basics: Subtraction (0:2:42) Math Basics: Multiplication (0:2:54) Math Basics: Division (0:2:15) Math Basics: Decimals (0:2:14) Math Basics: Percents (0:2:30) Math Basics: Reading and Writing Fractions (0:2:31) Math Basics: Reducing Fractions (0:2:10)