00478naa#a2200169#i#450# EN\INFRA-M\bibl\807 20260716134541.4 1998-0728 20131121b2013####ek#y0engy0150####ca RUS RU Practical work in mathematics as methodical innovation Journal article Moscow INFRA-M Academic Publishing LLC. 2013 4 с. Journal article local Smoleusova T. V. naukaru.ru