LDR 00720naa#a2200169#i#450# 001 EN\INFRA-M\bibl\81623 005 20241223093812.1 011 ## _a1998-0728 100 ## _a20240411b2024####ek#y0engy0150####ca 102 ## _aRU 200 1# _aThird-grader and Mathematics: Mastering an Academic Subject within the Framework of the Requirements of the Current Standard _eJournal article 210 1# _aMoscow _cINFRA-M Academic Publishing LLC. _d2024 215 ## _a6 с. 608 ## _aJournal article _2local 675 ## _aПервая ступень обучения. Начальная школа. 373.3 _aматематики. 372.851 _aРазвивающее обучение. 371.315.5 _z 700 #1 _aRydze _gOxana Anatol'evna 856 4# _anaukaru.ru _u