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
Solving complex, multi-step word problems and combinatorial tasks.
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.
Introduction to fractions and basic geometric concepts (shapes, area, and perimeter). Measurement units for length, mass, capacity, and time.