The aim of this research is to determine the influence of the Indonesian Realistic Mathematics Education (IRME) learning model. The subjects of this research were 10th grade students at a public high school in Yogyakarta. This type of research uses experimental research with a quasi-experimental or quasi-experimental design. The data collection technique uses a distribution of pretest and posttest questions. The research instrument used was a test sheet. The data analysis used was the normality test, homogeneity test, and paired sample t-test. The results of the research show that there is a difference in the average score between the pretest and posttest which shows that there is a significant increase in the average of 33.30. The hypothesis results show a comparison of the tcount and ttable tests, where the tcount value is 26.281 and the ttable value is 2.030. This means that the value of tcount > ttable. This means that the Indonesian Realistic Mathematics Education (IRME) learning model influences students' numeracy abilities.
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