The book is primarily aimed at students of economics, but also at those interested in other fields. This workbook is structured according to the introduction to economics by Paul Engelkamp and Friedrich L. Sell and covers its entire content. Therefore, it is considered a very valuable supplement, especially for exam preparation. All tasks in this book were part of oral or written exams. The solution outlines and the discussion of the results further illustrate the economic methods and potential sources of error in answering the questions. The 4th edition has been completely updated and expanded to align with the content of the new edition of the aforementioned textbook. Those who work through the exercises carefully will reinforce their knowledge and prevent misunderstandings.