Understanding the value of money denominations is an important part of basic mathematical learning because it involves number recognition, arithmetic operations, and the application of mathematical concepts in everyday situations. However, students may experience difficulties when mathematical concepts are presented without concrete contexts that are familiar to them. This community service activity aimed to strengthen elementary school students’ understanding of money denomination values and their ability to apply basic mathematical concepts through contextual learning activities. The activity employed a Service Learning approach in the form of learning assistance and educational services, integrating mathematical learning with situations related to the use of money in daily life. The activity was conducted on June 11, 2026, in Nagari Sikucur, V Koto Kampung Dalam District, Padang Pariaman Regency, West Sumatra, involving 30 students from grades III, IV, and V, who were divided into six groups. The learning activities included material presentation using a smartboard, examples and exercises involving money denominations, group problem-solving, learning assistance, and the Cerdas Cermat Cilik (3C) Finansial competition. Evaluation was conducted through direct observation, students’ work, participation in learning activities, and documentation. The results showed that students were able to practice identifying money denominations, combining different denominations to obtain certain values, performing simple calculations, and solving contextual problems related to purchases and savings targets. Students also demonstrated active participation in discussions, problem-solving, and the competition. This activity contributes to mathematics education by demonstrating that Service Learning combined with familiar financial contexts can provide meaningful learning experiences while connecting mathematical concepts with students’ everyday lives.