Numeracy literacy deals with the application of mathematical concepts in daili life. In this study, the worksheets are desgned to present mathematical concepts in daily life by using story problem. Students are presumed to be able to solve story problem if they can understand the meaning of the problem. Thus, students can find problem that need to be solved in the right way. This study aims to investigate the correlation between mathematical understanding skill with reading comprehension skill of elementary school students. The study implemented the correlation method by involving fourth grades students in two elementary schools. Data collection techniques used technical tests, then the data was analyzed by pearson-correlation test. The result of the study shows that there is correlation between mathematical understanding and reading comprehension skill of elementary school students. The students are not only to understand mathematical concept and gain reading comprehension skill but also know about Indonesian local wisdom. This is due to the concept of story problems which integrated with local wisdom.