: Sites such as Infourok provide detailed walkthroughs of sample variants for exams on rational fractions and other key topics.

: Resources like Aversev offer free downloads of answer keys for specific 8th-grade manual editions.

: Platforms like Online School №1 offer video lessons, summaries, and interactive tests to supplement classroom learning.

: 100Ballnik provides full sets of tasks and answers specifically for end-of-year final exams.