Savina Boonsen. (2023) The Development of Mathematical Learning Achievement on Multiplication Using Skill Exercises for Prathomsuksa 2 Students at Suraohayeemina School. <i>Interdisciplinary Academic and Research Journal</i>, <i>3</i>(4), ึ707-720.Savina Boonsen. "The Development of Mathematical Learning Achievement on Multiplication Using Skill Exercises for Prathomsuksa 2 Students at Suraohayeemina School". Interdisciplinary Academic and Research Journal 3 (2023):ึ707-720.Savina Boonsen. The Development of Mathematical Learning Achievement on Multiplication Using Skill Exercises for Prathomsuksa 2 Students at Suraohayeemina School. DR.KEN Institute of Academic Development and Promotion.:ม.ป.ท. 2023.