00504naa#a2200157#i#450# EN\\bibl\90620 20241125150259.1 2542-1840 20241114b2024####ek#y0engy0150####ca RU Mathematical Research Task in Pairs as a Means of Assessing Meta-Subject Skills in Schoolchildren Journal article Kemerovo Kemerovo State University 2024 13 с. Journal article local Pozdnyakova Elena Valer'evna jsocnet.ru