The start of the new school brings new challenges for the children and perhaps some uncertainty as well. With this workbook, children can review and practice topics covered in math class, deepening their mathematical knowledge and skills. This way, they feel more confident for lessons and upcoming tests. The following topics are included in the workbook: natural and whole numbers, basic arithmetic operations, expressions, calculations with measurements, handling diagrams, and combinatorics. In the detachable solution section, there are complete and partially illustrated solution paths, allowing students to independently follow and verify their calculations.