You can find detailed exercise-by-exercise solutions on platforms like Resh Skysmart or purchase the physical guides through Akademkniga/Uchebnik .
Русский язык. 4 класс. Учебник. Часть 2. ФГОС - My-shop.ru n.a churakova russkii iazyk 4 klass upr
Identifying verb conjugations (1st and 2nd) and correctly writing unstressed personal endings. n.a churakova russkii iazyk 4 klass upr
The first part focuses on foundational grammar rules and the analysis of words as parts of speech. n.a churakova russkii iazyk 4 klass upr
The second part is designed as a practical guide for applying knowledge.
Exercises on identifying prefixes, roots, suffixes, and endings.
Introduction to homogeneous members of a sentence and their punctuation.