00489naa#a2200169#i#4500001002100000005001700021011001400038100004100052101000800093102000700101200008500108210005100193215001000244608002700254700002400281856001400305EN\INFRA-M\bibl\153620240920022147.5##a1998-0728##a20140217b2014####ek#y0engy0150####ca0#aRUS##aRU1#aDivision of sum by number (mathematics lesson in the 4th Grade)eJournal article1#aMoscowcINFRA-M Academic Publishing LLC.d2014##a5 с.##aJournal article2local#1aSemikopenkogL. Yu.4#azh-szf.ru