This study aims to determine the relationship between numeracy skills and mathematical self-concept. The research was conducted using a correlational method with a quantitative approach. The subjects of this study were students of classes VIII-D and VIII-F at a junior high school in Magelang City. Data collection techniques included a numeracy skills test and a mathematical self-concept questionnaire. The data analysis technique simple linear regression analysis. The results showed a significant and fairly strong positive relationship between numeracy skills and mathematical self-concept, as indicated by a correlation coefficient of 0.589. Furthermore, the regression analysis showed a significance value of 0.000, which is less than , indicating that mathematical self-concept significantly and positively predicts numeracy skills. These findings highlight the importance of strengthening students’ mathematical self-concept as part of efforts to support the development of numeracy skills.
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