00637naa#a2200169#i#450# EN\INFRA-M\bibl\81633 20250111051943.6 1998-0728 20240411b2024####ek#y0engy0150####ca RU Pedagogical Techniques for Eliminating Difficulties in Solving Word Problems by Fourth-Graders Journal article Moscow INFRA-M Academic Publishing LLC. 2024 7 с. Journal article local Первая ступень обучения. Начальная школа. 373.3 математики. 372.851 Solnceva Ol'ga Igorevna naukaru.ru