%0 Journal Article %A K. P. Gorshenin %T Analysis of the mathematical model of a real situation as a tool for developing multilevel tasks %J Matematičeskoe obrazovanie %D 2019 %P 30-37 %N 4 %U http://geodesic.mathdoc.fr/item/MO_2019_4_a2/ %G ru %F MO_2019_4_a2