Entertaining arithmetic evenings for grade 4 (1960)

A study of arithmetic can turn into a fascinating adventure from a complex and boring lesson. The author offers young readers along with the heroes of the book - schoolchildren from the mathematical circle - to go on an entertaining journey through the fantastic world of numbers, calculations, multiplications, divisions, additions, subtraction.
How to guess the exact date of birth of a person? Did the old Hottabych knew arithmetic well? What are the Arabic method of multiplication and the Indian method of dividing numbers? What are giant numbers?
The book in a playful way explains the basic laws of arithmetic, understandable examples and interesting facts are given. The publication also contains many arithmetic tricks, puzzles, puzzles and games.
The manual is intended for primary school students as additional training and assimilation of material completed at the school