V. Nechaeva (2017 edition), likely specifically for a "reshebnik" (answer key or GDZ).
To get the most accurate results when searching on your own, try these specific Russian terms:
: Distinguishing between words and sentences, and understanding how thoughts are completed in writing. Search Tips for Finding the Exact Version chitat reshebnik russkii iazyk 2 klass nechaeva 2017 onlain
: Mastering the Russian alphabet, distinguishing between vowels and consonants, and understanding hard/soft or voiced/voiceless sounds.
ГДЗ по русскому языку за 2 класс, решебник и ответы онлайн V. Nechaeva (2017 edition)
: Rules for transferring words (hyphenation), spelling combinations like ЧН and ЧК, and handling double consonants.
: You can find official textbook descriptions and sometimes previews on platforms like the Russian National Electronic Library (Rusneb) . distinguishing between vowels and consonants
(GDZ Russian 2nd grade Nechaeva 2017)