More than 60 million Teach Yourself products sold worldwide! A helpful guide for students struggling with algebra Understand Algebra provides everything you need to broaden your skills and gain confidence. Assuming only a basic level of arithmetic, this carefully graded and progressive book guides them through the basic principles of the subject with the help of exercises and fully worked examples. Includes: One, five and ten-minute introductions to key principles to get you started Lots of instant help with common problems and quick tips for success, based on the author’s many years of experience Tests in the book to keep track of your progress Exercises and examples with full answers allow you to practice your new skills progressively Topics include: The meaning of algebra; Elementary operations in algebra; Brackets and operations with them; Positive and negative numbers; Expressions and equations; Linear equations; Formulae; Simultaneous equations; Linear inequalities; Graphical representation of quantities; Straight line graphs; coordinates; Using inequalities to define regions; Multiplying algebraicalalgebraics; Factors; Fractions; Graphs of quadratic functions; Quadratic equations; Indices; Logarithms; Ratio and proportion; Variation; The determination of laws; Rational and irrational numbers; Arithmetical and geometrical sequences