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Hasret Kabaran, Neşe Işık Tertemiz. A Review of Primary School 2nd Grade Students’ Flexible Problem Solutions That Require Adding and Subtracting with Natural Numbers. Elementary Education Online [Internet]. 2023 Dec. 13 [cited 2024 Dec. 22];18(4):1837-5. Available from: https://ilkogretim-online.org/index.php/pub/article/view/1421