15 000 примеров по математике. Счет в пределах 20. 1 класс

The guide includes mathematical examples on basic topics of elementary school "Counting within 10", "Counting within 20" and all algorithms of calculations. Each subtopic begins with a detailed explanation of how the operation is performed and contains various tasks that allow for a deeper understanding of the material. The student not only solves the example but also finds mistakes in the examples, inserts missing numbers, solves examples in a timed manner, chains of examples, equations, performs calculations according to diagrams. For elementary school.