is a specialized teaching aid authored by N. B. Istomina and G. G. Shmyreva , designed to accompany the primary Grade 3 mathematics curriculum published by Association XXI Century . Core Content and Structure
The manual contains structured tests that focus on both and metasubject skills , ensuring students can apply mathematical logic beyond simple calculation. Key Topics Covered: Multi-digit numbers (up to 1,000) and number comparisons.
Operations including addition, subtraction, multiplication, and division within 100 and up to 1,000.
Solving complex, multi-step word problems and combinatorial tasks.
