This workbook is designed for children who can already count up to 30. It will teach them to count and write numbers up to 120. By completing the tasks, the child will acquire skills that will help them easily perform simple mathematical operations, such as addition and subtraction, in the future. The writing practice tasks are structured from simple to complex. By completing similar tasks one after another, the child will quickly memorize the shape of the digits and master the principle of writing them. The workbook is intended for children aged 4 to 6 years.