Most sites (like Gdz.ru or Reshak ) organize the solutions by exercise number (uprazhnenie). Since Part 1 usually covers phonetics, word parts (root, prefix, suffix), and basic parts of speech, the answers are usually presented as clear, handwritten, or typed text blocks.
It sounds like you're looking for a quick way to check homework for textbook without the hassle of downloading sketchy files.
Websites can be cluttered with aggressive ads. You have to be careful not to just "copy-paste" without thinking, as Part 1 of Grade 3 builds the foundation for the rest of the year. Quick Tip