Abregana ES, Sabacajan BT, Morados AN, Nahial WL. Challenges Encountered in Teaching Four Basic Operations in Mathematics and Academic Performance among Pupils. Int. J. Multidiscip. Appl. Bus. Edu. Res. [Internet]. 2025 Feb. 23 [cited 2026 Jan. 24];6(2):554-63. Available from: https://ijmaberjournal.org/index.php/ijmaber/article/view/2244