Mathematics. 2nd grade. Oral counting trainer within 100. Addition and subtraction.

The exercise book is designed to practice oral addition and subtraction skills within 100 without crossing over to the next place value. The exercise book includes 3 themes. For the convenience of students, themes 1 and 2 have separate tasks for addition and subtraction. Theme 3 includes tasks to reinforce and review addition and subtraction techniques within 100 without crossing over to the next place value in mixed type tasks. Many tasks include a gaming component and hints for self-checking. Each theme concludes with a speed counting task that is performed with a stopwatch. The exercise book contains control pages for each proposed theme and a final test. These pages can be removed in advance and used after completing the theme. After completing each task, the student can check their work using the answers on special pages, which are also recommended to be cut out and used after completing the tasks. This manual will allow parents and educators to assess the child's mastery of the material, identify gaps, and organize work to reinforce knowledge and address difficulties. The publication is suitable for lessons in various school programs and is intended for students in grades 2 and 3, their parents, and educators.