How many different methods do you know to solve simultaneous equations? To multiply decimals? To find the nth term of a sequence? A Compendium of Mathematical Methods brings together over one hundred different approaches from classrooms all over the world, giving curious mathematicians the opportunity to explore fascinating methods that they've never before encountered. If you teach mathematics to any age group in any country, you are guaranteed to learn lots of new things from this delightful book. It will deepen your subject knowledge and enhance your teaching, whatever your existing level of expertise. It will inspire you to explore new approaches with your pupils and provide valuable guidance on explanations and misconceptions. Woven throughout this compendium are extracts from antiquated maths textbooks. We glimpse into the past to see what has changed, and we marvel at the curiosities we encounter. The following topics are featured: Subtraction; Multiplication; Decimal multiplication; Division; Fraction division; Highest common factor and lowest common multiple; Reverse percentages; Two-step linear equations; Linear simultaneous equations; Expanding double brackets; Factorizing non-monic quadratics; Linear sequences; Quadratic sequences; Equations of linear graphs; Quadratic inequalities; Vertex of a quadratic; Simplifying surds; Angles in polygons; Polynomial division