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Students often have a wrong understanding on multiplication of fractions in which they consider multiplication of numbers, the value definitely will always be higher. It underlies the researchers to design the learning of fractional multiplication operations with natural numbers using hurdles context with real problems. The purpose of this study is to find out the role of hurdles in helping the students' understanding on basic concepts of fractional multiplication operations with natural numbers by the approach of Indonesian Realistic Mathematics Education (PMRI). The method used is research design. This study described how this hurdles made a real contribution to the students of the fifth grade, SDN 179 Palembang, Indonesia to understand the concept of multiplication of fractions with natural numbers. The results showed that the context of hurdles can help students to understand their knowledge about the concept of multiplication of fractions with natural numbers. Strategy in answering, the model found by the students, and discussion in front of the classroom have built constructive ideas and contributions to the students so that it can be used as an initial knowledge of understanding their concept, namely the concept of multiplying fractions with natural numbers. Students’ learning process is essential in understanding the multiplication of fractions with natural numbers from informal stage to the formal stage. Keywords—Design research, Fraction, Hurdles, PMRI

Multiplication of Fraction With Natural Number by Using Hurdles