Тесты по математике для 6 класса онлайн - МетаШкола
: Provides free online tests and simulators specifically designed for 6th-grade students to prepare for exams and Olympiads. testy po matematiki v 6 klasse onlain
These sites offer free tests aligned with standard school topics like decimals, ratios, and integers: ad-free tests covering sets
If you are looking for more rigorous "Russian Math" style problems or specific papers for download: testy po matematiki v 6 klasse onlain
: Offers a wide variety of user-generated and formal tests, including comprehensive final exams like the 10-question final test based on Nikolsky’s textbook.
Тесты по математике за 6 класс онлайн
: Features 42 free, ad-free tests covering sets, geometry, and divisibility. You can earn a certificate if you score over 90%.