The first steps in mathematics. Textbook for grade 4 (1930)

The manual contains simple tasks and examples, thanks to which a four -grader will continue to get acquainted with the basic mathematical rules. The tasks are divided thematically: from the repetition of addition, subtraction, multiplication and division of multi -digit numbers to finding the volume of the prism and basic geometric tasks. In addition, the child will learn to work with simple fractions, find parts from the whole and the arithmetic mean, as well as build corners and calculate the area of ​​the triangle. Practical tasks are accompanied by capacious theoretical inserts. All tasks are formulated briefly and accessible, and some of them have explanatory comments. At the end of the book, tasks are collected for repeating and consolidating the material covered. The manual will be useful to both primary school teachers and parents who are engaged with children additionally