This book helps children learn, understand, and fully grasp the material of Mathematics in the 4th grade of primary school.

It is written following the paragraphs of the textbooks and includes:
- the theory that every child should know, which is explained with the help of examples and diagrams,
- many exercises for practice, several of which are accompanied by a solved example,
- evaluation criteria per unit and criteria for each teaching period,
- the solutions to the exercises in the book,
- an appendix with all the necessary auxiliary elements (preparation, divisions, solid developments, tangrams, coins, and banknotes).