Improving The Ability Of Subtracting Small Numbers By Large Numbers Using The Jurang Board Media For 2nd Grade Elementary School Students At Sdn 4 Gondang In The 2024/2025 Academic Year. JIME [Internet]. 2025 Oct. 10 [cited 2026 Sep. 18];11(4):985-91. Available from: https://ejournal.mandalanursa.org/index.php/JIME/article/view/9366