2012 which are also in the low material mastery group 
(Stacey, 2015). 
Based on the data, students' ability in 
understanding mathematics is very low. The ability of 
students in solving mathematical problems can be 
known through the tests given when the evaluation of 
mathematical learning. In the process of mathematics 
learning, students often make mistakes. The number 
of mistakes made in working on mathematical 
problems into a hint of the extent to which student 
mastery of the material. From the mistakes made, it 
can be further investigated about the source of errors 
committed by students. The cause of the mistakes 
made by the student should immediately get a 
complete solution. This solution is done by analyzing 
the root cause of the error, and afterward identified 
the types of mistakes that are commonly done by 
students in crafting math tests. 
The mistakes made by students are obstacles to 
learning mathematics. According to Taylor Koriakin, 
et al error is a form of deviation from the right, pre-
determined procedural or deviation from an 
expected(Taylor, Bogdan and DeVault, 2015). 
Identifies the type of miscalculation of the count 
operation performed by the student(Mercer and 
Mercer, 1989). The types of mistakes made by 
students are divided into operating errors, 
computational errors, algorithmic errors, and random 
answers. This is similar to what is described by 
Radatz, there are 3 indicators of the type of error that 
is: a) misconceptions, mistakes made by students in 
using the concepts related to the material, b) Errors of 
principle, errors in using the rules or mathematical or 
incorrect formulas in the use of principles relating to 
the material, c) Operational error, errors in operation 
or calculation. Certainly, the student's mistake will 
have an impact on the outcome of the learning process 
(Radatz, 1980). 
The factors that influence student learning 
outcomes are two factors, among others internal 
factors, namely the lack of special talent in doing 
certain situations, lack of basic skills possessed by 
students, lack of motivation and motivation to learn 
and physical factors which does not support learning 
activities (Lim and Morris, 2009). Another factor is 
about how the character of students in the learning 
process, as well as learning styles owned by each 
student. Mistakes in mathematical problem solving 
can also be observed from student learning styles 
(Ryan and Williams, 2007). In line with that opinion, 
Eugene A Geist, and Margaret King suggests that 
students' mistakes can be seen from the student's 
learning style, of course, because every individual has 
different characters, so in the case of any questions 
the factors can cause students to make mistakes(Geist 
and King, 2008). 
Learning styles are a combination of how one 
absorbs, and then organizes and processes 
information (Schmeck, 2013). Learning styles are not 
just aspects of facing information, seeing, listening, 
writing and saying but also the aspect of information 
processing, analytical, global or left-brain right brain, 
another aspect is when responding to something in the 
learning environment (abstractly and concretely 
absorbed). This is in line with the view of Riding & 
Rayner, which suggests a student learning style that 
is the consistent way in capturing stimulus or 
information, how to remember or think and solve 
problems(Riding and Rayner, 2013). Learning styles 
are the way students tend to react and use incentives 
to absorb and then organize and process information 
in the learning process. 
David Kolb's learning model is a learning style 
that involves new student experiences, develops 
observation/reflection, drafts, and uses theories to 
solve problems. Student learning styles are influenced 
by personality types, habits, and develop over time 
and experience. The model is built on the idea that 
learning preferences can be explained by the active 
observations of experiments-reflections and 
experiences of abstract concrete concepts. The result 
is that there are four types of learners: convergent 
(experimental experimental-experimental abstract), 
accommodator (experimental - active experience), 
assimilation (conceptualization of abstract - reflective 
observation), and divers (reflective viewing 
experience)(Kolb, 1981). 
Based on observations in one of the Vocational 
High Schools, many students complained that they 
had difficulty in understanding math problems. The 
mathematics whose primary purpose is to form 
students with the first critical, logical and systematic 
ability is fortified with the mathematical fears 
themselves. In addition, mathematics teachers argue 
that during this time students have a variety of 
learning styles that have not been known for sure, of 
course, this is correlated with the learning process 
conducted in the classroom. Thus, the researchers are 
interested in learning styles according to David 
Kolb's theory. where individual differences are 
mapped into different types of learning styles. 
Observing the problem, in previous studies have 
not paid attention to the analysis of student errors on 
differences in learning styles that students have. In 
addition, the analysis of student error in solving 
mathematical problems can be detected through the 
answers to exercise questions. Thus, researchers are 
encouraged to analyze student errors.