Idiot's guides : basic math and pre-algebra

__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®. pt. 1. The world of numbers 1. Our number system The counting numbers Scientific notation Rounding 2. Arithmetic Addition and subtraction Multiplication and division 3. Order of operations and integers Order of operations The distributive property The integers Arithmetic with integers 4. Factors and multiples Prime numbers Prime factorization Greatest common factor Least common multiple 5. Fractions The rational numbers Arithmetic with fractions 6. Decimals Decimal fractions Powers and scientific notation revisited Arithmetic with decimal fractions Rational and irrational numbers 7. Ratios, proportions, and percentages Proportional reasoning Calculating with percentages pt. 2. Into the unknown 8. Variables and expressions Using variables Multiplying with variables Dividing with variables 9. Adding and subtracting with variables "Like terms" Adding and subtracting like terms Simplifying expressions Polynomials 10. Solving equations and inequalities Using equations to find the missing number One solution or many? 11. Coordinate graphing The coordinate plane Graphing linear equations Graphs of inequalities pt. 3. The shape of the world 12. Basics of geometry Points, lines, planes and angles Parallel and perpendicular lines 13. Triangles Facts about triangles Classifying triangles Right triangles Area and perimeter 14. Quadrilaterals and other polygons Parallelograms Rectangles Rhombuses and squares Trapezoids Perimeter of quadrilaterals Area of quadrilaterals Polygons with more than four sides 15. Circles The language of circles Segments and angles Lines and angles Area and circumference Circles in the coordinate plane 16. Surface area and volume Measuring solids Prisms Pyramids Cylinders Cones Spheres 17. Geometry at work Areas of irregular figures Similarity and congruence Indirect measurement with similar triangles Indirect measurement with trigonometry pt. 4. The state of the world 18. Probability Counting methods Relative frequency Theoretical probability Probability of compound events 19. Graphs Bar graph Histogram Circle graph LIne graph 20. Measures of center and spread The centers The separators The spread pt. 5. Extra practice Arithmetic Algebra Geometry Probability and statistics. When not used on a daily basis, basic math concepts are difficult to recall and use. When people plan to return to school, they must take entrance and placement exams with a significant math portion. Idiot's Guides: Basic Math and Pre-Algebra helps readers get back up to speed and relearn the primary concepts of mathematics, geometry, and pre-algebra so that they can pass entrance exams, such as the GED, ASVAB, and Praxis, as well as remedial math courses. Ideal for both students and parents, Idiot's Guides: Basic Math and Pre-Algebra will include a workbook component with practice problems to help reinforce the math concepts. In this book, readers get:- An introduction to positive and negative numbers and place values- A solid review of the four basic math operations: addition, subtraction, multiplication, and division- Step-by-step guidance on how to understand and solve word problems- An explanation of the concepts of factors and multiples- Help in working with fractions, decimals, and percents- The basics of geometry- Weights, measures, and other practical applications of mathematics- How to create and interpret mathematical graphs- A grounding in statistics and probability- An introduction to algebraic concepts and problems, including expressions and equations Math skills come easily to some people, but for others, the number just don't add up. This helpful guide gives you a solid foundation in mathematics, with clear explanations, handy tutorials, and practice problems and answers.