: Provides a convenient interface to switch between chapters and specific lesson numbers for the 2016 edition.
Ready-made solutions (GDZ) for the textbook by T.E. Demidova, S.A. Kozlova, and A.P. Tonkikh (School 2100 system) are available for free viewing online across all three parts of the curriculum. These resources provide step-by-step solutions for tasks and problems directly in your browser. Reliable Online Platforms for Solutions
: Offers current answers for the 2025-2026 academic year, including "check yourself" sections.
: Allows you to flip through the digital version of the textbook pages online.