It looks like you're searching for study aids or "GDZ" (готовые домашние задания) for the textbook by L.Y. Zheltovskaya and O.B. Kalinina .
Developing "orthographic vigilance" (spotting tricky spelling spots). spishi.ru russkii iazyk 3 klass zheltovskaia
Parts of speech (Nouns, Adjectives, Verbs) and their basic inflections. It looks like you're searching for study aids
If you’re checking a parsing exercise (like phonetic analysis or sentence structure), make sure you understand why a letter is silent or why a comma is there. Try to solve the exercises on your own
Try to solve the exercises on your own before looking up the answers. It's the best way to actually remember the rules.
This textbook is part of the "Planet of Knowledge" (Планета знаний) series. It’s known for focusing on the logic behind grammar and expanding vocabulary through literature. Quick Tips for Using Answer Keys: