GDZ resources for this specific workbook (available on platforms like GDZ.ru ) provide:

It is a "workbook-problem book" ( tetrad-zadachnik ), meaning it combines theory-based exercises with space for students to write their answers directly in the book. Key Educational Focus

The for the 4th-grade Russian language workbook ( tetrad-zadachnik ) by M.S. Soloveichik and N.S. Kuzmenko is a widely used resource for students following the "Harmony" ( Garmoniya ) educational program. This workbook is designed as a practical supplement to the main textbook, focusing on independent student activity and deepening linguistic knowledge. Workbook Overview Authors: M.S. Soloveichik and N.S. Kuzmenko.