00720naa#a2200169#i#4500001002200000005001700022011001400039100004100053102000700094200014700101210005100248215001000299608002700309675017000336700002900506856001500535EN\INFRA-M\bibl\8162320241223095332.1##a1998-0728##a20240411b2024####ek#y0engy0150####ca##aRU1#aThird-grader and Mathematics:  Mastering an Academic Subject within the Framework of the Requirements of the Current StandardeJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2024##a6 с.##aJournal article2local##aПервая ступень обучения. Начальная школа. 373.3aматематики. 372.851aРазвивающее обучение. 371.315.5#1aRydzegOxana Anatol'evna4#anaukaru.ru