While the 19th edition is a specific print run, modern digital versions of the GDZ often cover a range of print years (e.g., 2015–2025) because the core curriculum remains largely consistent across editions. You can find digital versions and exercise solutions on platforms like MegaResheba or Euroki .
Most resources, such as GdzBakulin and Uchim.org , provide detailed breakdowns of over 1,100 exercises.
Introduction to arithmetic square roots, their properties, and real numbers.