The series "Calculate - with Cat and Mouse" is a revised edition of the successful mathematics workbooks from Diesterweg. The workbooks are suitable for independent practice and deepening of all arithmetic content in class or at home. They are based on proven principles such as a course-independent exercise program, the promotion of automated calculation, a clearly structured, step-by-step approach, the double-page principle, and self-explanatory exercises that are nearly text-free and suitable for independent work. Self-assessment options and the possibility for self-evaluation encourage individual and reflective work. Solutions are included with the workbooks.