Arithmetic textbook for primary school. Part I. 1933

Textbooks compiled by the famous Soviet educator-methodologist, associate professor Natalia Popova, are considered standard for studying arithmetic in primary classes. They are characterized by strict sequence, clear structure, precision in the presentation of information, perfectly adapted for the understanding of... younger school-age children. This edition is an original text from 1933.
The textbook introduces the first ten and the first hundred, and offers the following tasks: counting and recording numbers; addition and subtraction without carrying and with carrying over ten; weighing; measuring in liters; straight and curved lines; addition, subtraction, multiplication, and division of round tens; measuring in decimeters and centimeters, time-related tasks; addition and subtraction without carrying over ten.