©2023 The Authors. Published by Rankiang Mathematics Journal which permits unrestricted use, provided the original author and source are credited math.ppj.unp.ac.id p-ISSN 2716-0726 e–ISSN 2716-0734 Indexed Rangkiang Mathematics Journal Volume 2, No. 2, 2023 Subject Areas: Mathematics Education Keywords: Differentiation, Problem-Solving, Teaching Materials, Mathematics Author for correspondence: Pipin Sumari e-mail: pipimath3@gmail.com Material Teach Differentiated Style Study for Increase Mathematical Problem Solving Abilities Pipin Sumarni 1 , Yerizon 2 , Erni Suharti 3 and Anny Sovia 4 1 PPG Prajabatan Matematika, Universitas Negeri Padang, Padang, Indonesia 2 Pendidikan Matematika, Universitas Negeri Padang, Padang, Indonesia 3 SMAN 8 Kota Padang, Padang, Indonesia 4 Universitas Negeri Jakata, Jakarta, Indonesia Abstract- This research was carried out with the aim of finding out the problems found in tenth grade, or what is called Phase E. This research is expected to be able to overcome the problems of students who experience problems in solving problems by looking at students' learning styles. The type of research used in this research is a classroom action research method with a qualitative approach. The instruments used in this research were a learning style questionnaire, observation sheets to observe interactions between teachers and students, as well as interactions between students during the mathematics learning process. This research was conducted in phase E. From the research conducted, it was found that the use of teaching materials with differentiated learning styles can improve students' problem-solving abilities. It can be seen because there is an increase from the initial diagnostic student scores to the second cycle. 1. Introduction Problem-solving in mathematics is a fundamental cognitive ability that can be trained and developed in students, so it is hoped that when students are able to solve mathematical problems well, they will be able to solve real problems after taking formal education (Gunsteren et al., 2001; Tsaparlis & Angelopoulos, 1999; Walker et al., 2008)). Problem-solving ability is an essential ability that students must have. Therefore, students must be trained to solve problems that can improve students problem-solving abilities. According to Polya ((Shadiq & Mustajab, 2010), there are four aspects of problem-solving abilities as follows: