Look for regional educational archives such as edu.tatar.ru which sometimes host standardized curriculum materials for student use.
The textbook is widely used in Russian schools and can be accessed through several official and educational platforms. skachat uchebnik matematiki 2 klass chast 2 demidova
You can often view the book for free on educational portals like Infourok . Look for regional educational archives such as edu
In the second half of the year, the curriculum shifts toward more complex operations and spatial reasoning: Mathematics – Grade 2 - WVDE skachat uchebnik matematiki 2 klass chast 2 demidova