Searching for "spishi.ru" (which roughly translates to "copy/crib from me") typically leads you to (Gotovye Domashnie Zadaniya) or Ready-Made Homework sites. For a 4th-grade student following the standard Russian curriculum—such as the widely used "School of Russia" series by Moro—Part 1 of the math textbook covers critical foundational transitions.
ГДЗ: готовые домашние задания за 1-11 класс - GDZ.RU spishi.ru matematika 4 klass chast 1 zadacha
Here is a blog post summarizing what you need to know about these 4th-grade math challenges and how to use resources like spishi.ru effectively. Mastering 4th Grade Math: A Guide to Part 1 Challenges Searching for "spishi