POPOM, K.; ANUTRAGULCHA, R. The Development of Mathematical Problem Solving Skills in the Subjects of Combined Addition and Subtraction Problems by using 5Es Inquiry Learning Cycle Integrated with TGT Cooperative Learning Technique for Prathom Suksa 2 Students. Academic Journal of Mahamakut Buddhist University Roi Et Campus, v. 10, n. 1, p. 507-517, 22 May 2020.