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
Introduction to fractions and basic geometric concepts (shapes, area, and perimeter). Measurement units for length, mass, capacity, and time. is a specialized teaching aid authored by N
Operations including addition, subtraction, multiplication, and division within 100 and up to 1,000. and perimeter). Measurement units for length
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. and time. Operations including addition
Solving complex, multi-step word problems and combinatorial tasks.