LDR 00489naa#a2200169#i#450# 001 EN\INFRA-M\bibl\1536 005 20241110040844.7 011 ## _a1998-0728 100 ## _a20140217b2014####ek#y0engy0150####ca 101 0# _aRUS 102 ## _aRU 200 1# _aDivision of sum by number (mathematics lesson in the 4th Grade) _eJournal article 210 1# _aMoscow _cINFRA-M Academic Publishing LLC. _d2014 215 ## _a5 с. 608 ## _aJournal article _2local 700 #1 _aSemikopenko _gL. Yu. 856 4# _azh-szf.ru _u