If you are stuck on a specific rule, here is a quick refresher on what this textbook usually covers at this stage:
You can find step-by-step answers for both Part 1 and Part 2 on several dedicated educational platforms. Some of the most reliable include: gdz po russkomu za 3 klass l.ia.zheltovskaia
Working with unstressed vowels, silent consonants, and the use of the hard sign (ъ) and soft sign (ь). If you are stuck on a specific rule,
: A popular alternative that break down tasks by page and exercise number. gdz po russkomu za 3 klass l.ia.zheltovskaia
It sounds like you're looking for help with the for the 3rd-grade Russian textbook by L. Ya. Zheltovskaya and O. B. Kalinina .