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It serves as a tool for self-checking homework and understanding complex problem-solving methods.

Segments, triangles, planes, rays, and measuring angles.

Notation, addition, subtraction, multiplication, and division.

The (or GDZ) for Erina’s workbook provides step-by-step answers and explanations for every exercise.

Areas, volumes, and using calculation tools. Using the "Reshebnik" (Solution Book)