: Step-by-step solutions for the older 2011 version are available on Vshkole .
Below are the most reliable ways to access the solutions (Reshebnik/GDZ) and the problem book itself: Online Solutions (GDZ) : Step-by-step solutions for the older 2011 version
: You can find verified answers and detailed explanations for the 2016 problem book on Obozrevatel . : Step-by-step solutions for the older 2011 version
: Sites like YaClass provide practice problems and formulas for major 8th-grade topics like electric current work and power ( Direct Downloads (PDF) : Step-by-step solutions for the older 2011 version