Textbooks are updated periodically. Ensure the online solutions match the edition your child has (look for the cover art).
Hard/soft signs, unstressed vowels, and "uncheckable" spelling words. Textbooks are updated periodically
Looking for "GDZ" (готовые домашние задания) for the 2nd-grade Russian language textbook by Klimanova and Babushkina is a common way to double-check homework or clarify tricky grammar rules. and "uncheckable" spelling words.
Make sure you aren't looking at the Rabochaya Tetrad (Workbook) answers if you actually need the ones from the main hardback book. Textbooks are updated periodically
Identifying the main idea and parts of a story. 2. How to Find Solutions Online
Since 2nd grade is foundational for literacy, it's best to let the child try the exercise first, then use the GDZ to explain why a certain letter is used.