This workbook offers a wealth of practice material for addition and subtraction within the number ranges of up to 10, up to 20, and up to 100. In each of the three chapters, you will find methodically varied tasks to practice the basic arithmetic operations of addition and subtraction: calculations with pictures, exchange, complement, and inverse tasks, step-by-step calculations, as well as auxiliary and neighboring tasks. To accommodate the different learning levels and competencies of all children, there are three worksheets for each practice topic, each with varying degrees of difficulty. This allows for optimal differentiation and the perfect support for every student. The photocopiable templates are based on the students' everyday lives and offer not only written tasks but also action-oriented elements and open-ended assignments—ensuring that there is a suitable task for every learning type. All solutions are suitable for self-checking.