00656naa#a2200169#i#450# EN\INFRA-M\bibl\55652 20240914150006.6 1998-0728 20221226b2022####ek#y0engy0150####ca RU On the Initial Stage of the Formation of Cognitive Universal Educational Activities in First-Graders in Mathematics Lessons Journal article Moscow INFRA-M Academic Publishing LLC. 2022 3 с. Journal article local Общие вопросы дидактики и методики воспитания и обучения. 37.02 Fedorova N. V. naukaru.ru