It consists of two workbooks (Part 1 and Part 2).
Юным Умникам И Умницам 1 Класс Холодова - OZON gdz dlia 1 klassa kholodova
Sites like Labirint or Ozon provide official descriptions and reviews that sometimes include solution tips. It consists of two workbooks (Part 1 and Part 2)
Digital copies and shared keys are often found on educational forums and groups, such as VKontakte (VK) . Usage Tips gdz dlia 1 klassa kholodova