Basic Math and Pre-Algebra For Dummies

Book excerpt: The fun and easy way® to understand the basic concepts and problems of pre-algebra Whether you're a student preparing to take algebra or a parent who needs a handy reference to help kids study, this easy-to-understand guide has the tools you need to get in gear. From exponents, square roots, and absolute value to fractions, decimals, and percents, you'll build the skills needed to tackle more advanced topics, such as order of operations, variables, and algebraic equations. Open the book and find: How to find the greatest common factor and least common multiple Tips for adding, subtracting, dividing, and multiplying fractions How to change decimals to fractions (and vice versa) Hints for solving word problems Different ways to solve for x