Amazon.com description: Product Description: Idiot's Guides: Basic Math and Pre-Algebra helps readers get up to speed and relearn the primary concepts of mathematics, geometry, and pre-algebra. Content includes basic math operations (addition, subtraction, multiplication, division); word problems; factors and multiples; fractions, decimals, and percents; weights and measures; graphs; statistics and probability; and algebra and geometry basics. A practice problems section is also included to help reinforce the math concepts. This book is ideal for anyone needing a refresher in order to pass entrance exams, such as the GED®, ASVAB, and Praxis®.