00615naa#a2200181#i#450# EN\INFRA-M\bibl\52557 20240521141215.2 2500-3305 20221222b2022####ek#y0engy0150####ca RU Text plot tasks with a parameter as a means of forming the research skills of students in grades 7–9 Journal article Moscow INFRA-M Academic Publishing LLC. 2022 7 с. Journal article local математики. 372.851 Pozdnyakova Elena Valer'evna Pichugova Viktoriya Viktorovna naukaru.ru