The Math Practice Book offers a practical approach to mathematical concepts that are important for engineering students. It addresses the common challenge of recognizing the relevance of mathematical techniques in engineering education. By presenting four exciting applications from the fields of control engineering, thermodynamics, and building physics, it demonstrates how mathematics can solve concrete problems in the engineering profession. The book guides readers step by step from a practical problem to the solution using varied instructional materials. Each chapter includes helpful tips and detailed solutions that deepen understanding. The content has been tested in collaboration with students at Ruhr University Bochum, highlighting the applicability and practical relevance of the methods presented.