@article{Thongmuang_Jantakoon_2023, title={The Development of Blended Learning Activities between Realistic Mathematics with Online Learning to Enhance Problem-Solving Ability and Mathematical Reasoning for Grade 5 Students}, volume={9}, url={https://so03.tci-thaijo.org/index.php/rpu/article/view/274263}, abstractNote={<p>The objectives of this research were to 1) create and find the efficiency of the development of blended learning activities between realistic mathematics with online learning to enhance problem-solving ability and mathematical reasoning for grade 5 students, and 2) compare problem-solving abilities and mathematical reasoning it uses a blended learning activity that combines real-life math concepts with online learning. The sample group was grade 5 students in the second semester of the academic year 2021 at WatKokraet School, Kongkrailat District, Sukhothai Province, with 15 people. The tools used include a blended learning activity that combines real-life math concepts with online learning, and the quiz measures problem-solving and mathematical reasoning abilities. The statistic used to analyze the data was the mean, standard deviation, and t-test.</p> <p>The results of the study showed that: 1) the development of blended learning activities between realistic mathematics with online learning to enhance the problem-solving ability and mathematical reasoning for grade 5, has four learning activities as follows, 1) percentage problem 2) price reduction problem 3) profit problem 4) loss problem the appropriateness was at the highest level. and the efficiency was 82.87/83.61, which was higher than the 80/80 criterion. 2) &nbsp;Grade 5 students could solve problems and reason in math. After class with blended learning activities between realistic mathematics with online learning higher than before with statistically significant at the .05 level.</p>}, number={3}, journal={Journal of Humanities and Social Sciences, Rajapruk University}, author={Thongmuang , Phitchayaphak and Jantakoon, Jakkrit}, year={2023}, month={Dec.}, pages={339–353} }