This book conveys mathematical concepts as clearly as possible. Therefore, the explanations are very detailed and illustrated with numerous figures. It builds only on the mathematical knowledge that most students of economics actually possess. The presentation of the material takes into account that for many who are starting their studies in economics, their school years are already years behind, and not everyone has taken an advanced mathematics course. Additionally, a comprehensive appendix outlines the most important mathematical concepts from middle school. The book not only covers the fundamentals but also addresses the essential mathematical areas relevant to economics, which are supplemented by typical economic applications.