While resources like Spishi.ru or GDZ.ru provide immediate answers, they are best used as a teaching aid rather than a shortcut:
Mordkovich often uses repetitive exercise structures to reinforce methods; use the solutions to understand the logic of the first problem in a set. spishi.ru 8 klass matematika mordokovich
Working with negative and zero exponents. How to Use the Solutions Effectively While resources like Spishi
Review the solutions for "Test Yourself" sections typically found at the end of each chapter. Where to Find Materials spishi.ru 8 klass matematika mordokovich