Most homework in the 4th grade comes from the Arbeitsbuch . When searching, specifically include "Рабочая тетрадь" in your query to get the correct answer key. Which specific author or textbook cover
Instead of downloading files that might contain viruses, many students and parents use "GDZ" (Ready Homework) websites to view solutions directly in the browser: skachat reshebnik nemetskogo iazyka 4 klassa
The most common series in Russia. Solutions often cover the textbook parts 1 and 2 as well as the workbook (Arbeitsbuch). Most homework in the 4th grade comes from the Arbeitsbuch
The official publisher's site often has useful articles and teacher's manuals that act as keys for the exercises. Quick Tips for 4th Grade skachat reshebnik nemetskogo iazyka 4 klassa