1.
Ritthitham T, Chumnasiao C. The Development Learning Achievement and Mathematical Process Skills on Decimals by Using Problem-Based Learning Model Combined with Deductive Teaching for Grade 5 Students . jomld [internet]. 2024 Dec. 30 [cited 2026 Oct. 11];9(12):387-99. available from: https://so06.tci-thaijo.org/index.php/jomld/article/view/275190