Addition and subtraction within 100. 2-3 grades

Olga Vasilievna Patkorova is a teacher-practitioner, author of more than 6,000 educational, methodological and developing aids for preschoolers and primary school students. According to the results of 2020, O.V. Uzorova was recognized as one of the most popular authors of textbooks in Russia.
“Addition and subtraction in the range of 100. 2-3 class” is a textbook based on an effective author"s methodology in O. . Pattern. The book will help students in elementary school master a quick score, develop computational skills and prepare for control and verification work. The material presented in the manual corresponds to all federal programs of elementary school.
for preschool and primary school age