An Nisa Suryani; Handayani, H.; akbar, A. EFFECTS OF LEARNING MEDIA TRAY BOARDS (DIVE AND TIMES) ON STUDENTS’ MATHEMATICAL UNDERSTANDING OF OPERATIONAL MATERIALS CALCULATE THE DIVISION AND MULTIPLE OF WHOLE NUMBERS: (Experimental Research on Class II Students of Paniis Elementary School, Tanjungkerta District Sumedang Regency Academic Year 2021/2022). JESA 2023, 7, 92-101.