The Kozlova/Rubin materials are known for "non-standard" problems that require logical thinking rather than just calculation. Practice Resources
Solving multi-step word problems involving "more than" or "less than". zadaniia po matematike 2 klass avtor kozlova rubin skachat
Basic geometric tasks, such as finding the of shapes. Logical & "Non-standard" Tasks: zadaniia po matematike 2 klass avtor kozlova rubin skachat
To find 2nd-grade math assignments by S.A. Kozlova and A.G. Rubin, you are likely looking for the (Контрольные работы) or "Didactic Materials" (Дидактический материал) that accompany the "School 2100" curriculum. Where to Find Materials zadaniia po matematike 2 klass avtor kozlova rubin skachat