IMPLEMENTASI MULTIMEDIA PADA MATERI PENGURANGAN BILANGAN BERSUSUN MENGGUNAKAN TEKNIK MOTION GRAPHIC 2 DIMENSI PADA SEKOLAH DASAR KELAS III (Studi Kasus: SD Negeri 4 Kalisalak)

Based on the problems encountered in the 3rd grade teacher of State Elementary School 4 Kalisalak that the teacher had difficulty in delivering the material of reducing the number of circumcision and the lack of supporting media so that students had difficulty understanding the material at the time of online learning. The purpose of this research is to implement multimedia in the form of 2-dimensional learning videos with motion graphic techniques in the subjects of mathematics of double number reduction materials for students of 3rd grade of State Elementary School 4 Kalisalak. The system development method used is multimedia development life cycle (MDLC) which consists of 6 stages, namely concept, design, material collecting, assembly, testing and distribution. The data used in the study was obtained through observation methods, interviews, literature studies, questionnaires and documentation. Results of the feasibility test through alpha test and beta test. The Aplha test showed that the learning video was worth testing because it had matched the storyboard that had been created before. While the results of beta tests showed results of 93.9% so it falls into the category of strongly agreed. With these results, the student response stated that the 2-dimensional multimedia video-based learning media on the number reduction material in addition to motion graphic techniques that have been made is clear, interesting, and fun. And the concept of the material conveyed is appropriate and easy to understand.