This research was motivated by the problem of low mathematics learning outcomes on third grade elementary school students. This research was a development research which applied ADDIE model. The purposes of this research were to describe the process of developing mathematics interactive multimedia and to describe the results of the mathematics interactive multimedia validity products. The methods used in data collection were interviews, document recording, observation and questionnaire. The research results were about; the mathematics interactive multimedia development process which consisted of five stages, namely: analysis, design, development, implementation, and evaluation; the results of validation test conducted by experts and product trial subjects showed that the mathematics interactive multimedia was valid based on: (a) the review result of learning content experts with very good qualifications (97.77%), (b) the review result of learning design experts with very good qualifications (91.42%), (c) the review result of instructional media experts with very good qualifications (96.66%), (d) the result of individual trials with very good qualifications (94%), (e) and the result of small group trials with very good qualifications (93.33%). Thus, the research showed that mathematics interactive multimedia had excellent qualification. The benefits of this research were to produce an interactive multimedia with the intention of facilitating the students learning process in class, especially for mathematics subject and to help teachers in creating pleasant learning conditions for students in the classroom.