TY CONF TI KEY POSITIONS OF THE IMPLEMENTATION OF CONTINUITY IN THE STUDY OF NATURAL NUMBERS AND FRACTIONS AT THE INITIAL AND BASIC STAGES OF EDUCATION KW Mathematical education KW continuity KW scientific character KW theoretical thinking KW natural numbers JO SCIENCE AND INNOVATION 2021: DEVELOPMENT DIRECTIONS AND PRIORITIES AU Trofimenko, Y.V. AU Krivets, A.A. PY 2024 PB AUS PUBLISHERS