You can find full solutions and answer keys for both Algebra and Geometry tests at these sites:

: Addition, subtraction, multiplication, and division of fractions.

: Provides a comprehensive list of answers for independent (самостоятельные) and control (контрольные) works.

: Solutions using the discriminant and Vieta's theorem. Geometry Section

: Parallelograms, rectangles, rhombuses, and squares.

The manual edited by E.P. Nelin typically follows this format for 8th graders:

: Offers PDF-format viewing for the 8th-grade Test-Control manual. 📚 Structure of the Manual

: Calculations for triangles and quadrilaterals.