Skvortsova S, Оnoprienko O, Romanyshyn R. Mathematical Word Problems That Contain a Constant in the Course of Mathematics of Primary School in Ukraine . jpnu [Internet]. 2021 Apr. 1 [cited 2024 Nov. 24];8(1):46-64. Available from: https://ktipe.pnu.edu.ua/index.php/jpnu/article/view/4939