Lawthongkum A, Khunno C, Samakhom L, Khomobklang S, Suksakunee J. Mathematic Supplementary Development on Title of Division, Addition, Subtraction, Multiplication and Decimal for Prathomsuksa 6 Students. IARJ [internet]. 2023 Aug. 1 [cited 2026 Aug. 29];3(4):227-36. available from: https://so03.tci-thaijo.org/index.php/IARJ/article/view/268963