The ability to solve problems is one of the necessary competencies of students. Therefore, forming and developing a problem-solving capacity for students is one of the crucial tasks in teaching in general and teaching mathematics in particular in elementary schools. This paper is aimed at developing elementary school problem-solving skills associated with the subject of fractions. The sample consisted of 42 fourth grade students who were taught by integrated activities to resolve real-word problems on the subject. A qualitative method was utilized to clarify students' problem-solving skills. The results were demonstrated that their performance of problem-solving skills improved significantly over level scales.