Since official keys are rarely published by the authors for student use, you can find help through the following channels:
: Sites like Aversev or Adu.by often provide teacher guides, lesson scenarios, and methodological materials that contain the reasoning needed to solve workbook tasks.
Searching for answers to the by S.V. Panov, V.A. Koshelev, and N.V. Baidakova can be challenging since these materials are regularly updated to match the national curriculum.
: Focus on the 1790s (partitions), 1812 (Napoleonic wars), and the reforms of the 1860s. These are frequent topics for workbook fill-in-the-blank tables.
История Беларуси, конец XIX - начало XX в.