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Desimal: Jurnal Matematika
Published by Universitas Islam Negeri Raden Intan Lampung
ISSN : 26139073     EISSN : 26139081     DOI : -
Core Subject : Education, Social,
Education Mathematics Social Sciences
Desimal: Jurnal Matematika, particularly focuses on the main issues in the development of the sciences of mathematics education, mathematics education, and applied mathematics. Desimal: Jurnal Matematika published three times a year, the period from January to April, May to Augustus, and September to December. This publication is available online via open access.
Arjuna Subject : -
Articles 330 Documents
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The effect of the open-ended learning model assisted by animation videos on the mathematical creative thinking ability Triana; Tanti Jumaisyaroh Siregar
Desimal: Jurnal Matematika Vol. 8 No. 2 (2025): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/1sd4aj52

Abstract

Mathematics plays a vital role in developing students’ cognitive and creative thinking skills. However, conventional learning approaches often fall short in stimulating students' mathematical creativity. This study investigates the effect of the open-ended learning model assisted by animation videos on students’ mathematical creative thinking ability. Using a quasi-experimental method with a quantitative approach, the study involved an experimental class taught with open-ended learning and animation videos and a control class with conventional instruction. Results showed that the experimental class outperformed in generating original, flexible, and diverse mathematical ideas. This indicates that integrating open-ended learning with visual animation support positively influences students’ creative mathematical thinking.
The effect of problem-based learning model assisted by independent learning activity units on numeracy literacy skill of grade X MA students Asruri, Selfi; Maysarah, Siti
Desimal: Jurnal Matematika Vol. 8 No. 2 (2025): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/mq0rsh61

Abstract

For students, numeracy literacy skills are very important for understanding and exploring quantitative relationships in real-world contexts. Low numeracy literacy skills among students are caused by teacher-centered learning. This study aims to determine the effect of the problem-based learning model assisted by Independent Learning Activity Units on the numeracy literacy skills of 10th grade MA students. The quantitative methodology used in this study is a quasi-experimental design employing a post-test-only control group design. The sample consists of 60 students divided into an experimental group and a control group, selected through purposive sampling from the population of X-grade students at MAN Serdang Bedagai. Sampling was conducted using purposive sampling, with the condition that both groups have a normal distribution and are homogeneous. This study used a numeracy literacy test instrument that has been proven to be valid and reliable. Data analysis techniques used the independent sample t-test. The conclusion that the use of the Problem-Based Learning model assisted by Independent Learning Activities units significantly influenced the numeracy literacy skills of grade X students at MA. Students taught using the Problem-Based Learning model assisted by Independent Learning Activity Units have been proven to be effective in improving students' numeracy literacy, particularly in the aspects of analysis, data interpretation, critical thinking, and problem solving, compared to students taught using conventional methods.
Comparative study of sugeno fuzzy method and mamdani fuzzy method for rice stock optimization at Perum BULOG North Sumatra regional division Siagian, Desmon Gunadi; Katrin Jenny Sirait; Anggiat Parlindungan Simbolon; Jamardua Haro
Desimal: Jurnal Matematika Vol. 8 No. 2 (2025): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/a7jvnx56

Abstract

Perum BULOG Regional Division of North Sumatra faces challenges in determining optimal rice stock levels due to uncertainties in supply and distribution. The purpose of this study is to optimize rice stock management by comparing two fuzzy inference methods—Fuzzy-Sugeno and Fuzzy-Mamdani in predicting monthly rice stock levels. The method used involves analyzing rice inflow, distribution, and stock data from January to December, applying each fuzzy method using the MATLAB 6.1 Fuzzy Toolbox. The Fuzzy-Sugeno model is implemented with rule-based systems whose outputs are expressed as linear functions of the input variables and defuzzified using the weighted average method. The Fuzzy-Mamdani model applies linguistic rules with fuzzy output sets and uses the centroid method for defuzzification. The results show that both methods can optimize stock estimation, but in different ways: Fuzzy-Sugeno produces dynamic predictions that closely follow monthly operational changes, making it suitable for short-term adaptive optimization, while Fuzzy-Mamdani yields more stable predictions, supporting long-term stock stability optimization. This finding provides a practical decision-support reference for BULOG to select the method that best aligns with operational goals, thereby improving rice stock management and distribution efficiency in North Sumatra.
The effect of the problem-based learning model integrated with the ethnomathematics of the marble game on students’ mathematical problem-solving ability afni, Syifa Husna Ramadhani; Ella Andhany
Desimal: Jurnal Matematika Vol. 8 No. 2 (2025): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/wc701526

Abstract

The current mathematics learning process still shows a lack of effectiveness, resulting in students’ low mathematical problem-solving abilities. This study aims to determine the effect of the Problem-Based Learning model integrated with the ethnomathematics of the marble game on students’ mathematical problem-solving skills. This quantitative research employed an experimental method. The results showed a significant effect of the PBL model integrated with the ethnomathematics of the marble game on students’ mathematical problem-solving abilities. The findings revealed that the PBL model integrated with the ethnomathematics of the marble game had a significant effect on the mathematical problem-solving abilities of eighth-grade students at MTs Negeri Batu Bara.
Exploration of ethnomathematics and the philosophical meaning of the Al-Abror Grand Mosque in Padangsidimpuan as a medium for delivering material on Solid Geometry Anggi Indah Riskiyah Harahap; Eka Khairani Hasibuan
Desimal: Jurnal Matematika Vol. 8 No. 2 (2025): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/27n8jm71

Abstract

This study investigates the three-dimensional geometric concepts and the underlying philosophical meanings embodied in the architecture of the Great Mosque of Al-Abror, Padangsidimpuan, employing a qualitative approach with ethnographic methods. The research is motivated by a notable gap in ethnomathematics scholarship, which has predominantly focused on identifying geometric forms without thoroughly integrating the associated philosophical and Islamic cultural values. Data were collected through direct observation, interviews with mosque administrators, and visual documentation, complemented by an extensive literature review. Data analysis was conducted using Miles and Huberman’s interactive model, encompassing data reduction, data display, and reflective conclusion drawing. The findings reveal that the mosque’s architecture incorporates a variety of three-dimensional geometric forms, including cubes, rectangular prisms, pyramids, cylinders, and spheres, which serve not only structural functions but also convey rich symbolic meanings, such as unity, steadfast faith, balance, and order in alignment with Islamic teachings. This integration of geometric analysis and philosophical interpretation offers a more contextualized understanding of mathematics and simultaneously fosters the internalization of cultural and religious values among learners. The novelty of this research lies in its comprehensive integration of geometric exploration with philosophical interpretation in the study of mosque architecture. Future research is encouraged to broaden the scope to other historical structures, develop technology-enhanced learning media, and evaluate their effectiveness in improving students’ academic performance and cultural appreciation.
The effect of the missouri mathematics project learning model on students' mathematical problem-solving ability on circle material Siti Zia Hadatul Hasanah; Nur Ainun Lubis
Desimal: Jurnal Matematika Vol. 8 No. 2 (2025): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/tfk2ry38

Abstract

Mathematics plays an important role in improving students' mathematical problem-solving abilities. However, mathematics learning using conventional learning models often fails to stimulate an increase in students' mathematical problem-solving abilities. This study investigated the effect of the Missouri Mathematics Project (MMP) learning model on students' mathematical problem-solving abilities. This study used a quasi-experimental method with a quantitative approach. The population in this study included all eighth-grade students of UPT SPF SMP Negeri 8 Percut Sei Tuan with a total of 185 students. This study involved an experimental class taught using the Missouri Mathematics Project learning model and a control class with a conventional learning model. The results showed that the mathematical problem-solving abilities of students who used the Missouri Mathematics Project (MMP) learning model improved more than those who used the conventional learning model. This indicates that the Missouri Mathematics Project (MMP) learning model has an effect on students' mathematical problem-solving abilities.
Multi-objective bees algorithm for portfolio diversification Farid, Fajri; Linda Rassiyanti; Rohmi Dyah Astuti; Ade Lailani
Desimal: Jurnal Matematika Vol. 8 No. 2 (2025): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/mttkw723

Abstract

Portfolio diversification is the practice of spreading investments across different types of stocks or sectors to reduce overall risk. The basic principle is that the poor performance of one stock asset can be offset by the satisfactory performance of another stock asset. This study uses the Bees Algorithm for portfolio optimization problems, aiming to discover the combination of stock proportions in a portfolio that maximizes stock returns and minimizes risk. Then, the Sharpe ratio value is calculated and compared with conventional methods. The expected return, risk, and Sharpe ratio values for the portfolio generated using the Bees algorithm are 0.178007%, 2.353956%, and 0.0663484322, respectively. According to the results, the Bees Algorithm had better results and performance than conventional methods. As a result, the Bees Algorithm outperforms conventional approaches.
Critical thinking profile of junior high school students in solving function problems as seen in the face of mathematical ability liloi, olvi; Sutji Rochaminah; Muh Hasbi; Baharuddin
Desimal: Jurnal Matematika Vol. 8 No. 2 (2025): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/jf5ymc83

Abstract

This study aims to describe the critical thinking profile of eighth-grade students of SMP Negeri 19 Palu in solving mathematical problems on the topic of functions. This type of research is descriptive research with a qualitative approach. The research subjects were three people who were selected based on their level of mathematical ability (high, medium, and low). Data collection techniques included written tests and interviews, with data credibility tested using time triangulation. The results showed that: 1) Students with high mathematical ability fulfilled all critical thinking indicators (focus, reason, inference, situation, clarity, and overview). 2) Students with moderate mathematical ability fulfilled five critical thinking indicators (focus, reason, situation, clarity, and overview) but were not accurate in concluding solutions. 3) Students with low mathematical ability only fulfilled three critical thinking indicators (situation, clarity, and overview) and had difficulty in providing reasons and determining appropriate solution strategies.
When proof meets personality: A study of artisan-type prospective teachers in mathematical problem-solving Widyastuti, Rany; Dimas Danar Septiadi; Ikha Yuliati; Fitriyatul Qomariyah; Fatimatuz Zahroh
Desimal: Jurnal Matematika Vol. 8 No. 2 (2025): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/e6rk0523

Abstract

Mathematical problem-solving ability is an essential skill for prospective teachers; however, many students still face difficulties, particularly in proof-based problems. Previous studies have mostly examined personality types in the context of application-based tasks, so there has been limited attention to students’ mathematical problem-solving abilities with the artisan personality type in dealing with proofs of statements. UIN Madura students in the Mathematics Education study program tend to have an artisan personality. They have a tendency to solve problems by using a common pattern. Therefore, when they faced mathematical proof comprehension problems, they often experienced difficulties and limitations. This made the researcher interested in conducting a study that aims to describe the abilities of UIN Madura students in the Mathematics Education study program in solving mathematical problems based on Polya's theory viewed from the artisan personality type. This study is a descriptive qualitative study. The subjects of this study were two students with the artisan personality type. Data collection instruments used questionnaires (personality type data), essay tests (problem-solving abilities), and interviews. Data analysis techniques used the Miles and Huberman technique. Based on the research results, it is known that artisan-type students can understand problems, make plans, and solve problems correctly but cannot re-check the results they have obtained. This indicates the tendency of artisan-type students to choose quick and simple approaches, yet with less accuracy in the verification process. This study contributes to the scientific development by highlighting the distinctive characteristics of artisan-type students in solving mathematical proofs. The findings of this research can serve as a basis for educators in designing learning strategies that are more aligned with students’ personalities.
Implementation of problem-based learning assisted by geometry-based student worksheets to improve mathematics learning outcomes of 8th grade students Anindya Hawa Ainul Fanfa; Muhamad Toyib
Desimal: Jurnal Matematika Vol. 8 No. 2 (2025): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/cpr8vs17

Abstract

This finding is motivated by the importance of improving mathematics learning outcomes through the application of effective learning methods. The purpose of the finding is to determine the effect of Problem Based Learning (PBL)-based learning with the utilization of Magnetic Ball-based Student Worksheets (MBSW) on the mathematics learning outcomes of eighth-grade students at MTsN 1 Wonogiri. This experimental research uses a control group and experimental group design. Two classees were selected through cluster random sampling from the eighth-grade student population. Class VIII A1 was assigned as the experimental group, receiving PBL with Magnetic Ball-based MBSW, while class VIII A2 served as the control group, using standard PBL without the magnetic ball aid. The findings show that the experimental grade that uses PBL assisted by Magnetic Ball MBSW has a more significant increase in learning outcomes than the control grade that uses the regular PBL model. The findings clearly show that PBL assisted with Magnetic Ball-based Student Worksheets is more effective than regular PBL in improving mathematics learning outcomes. While students’ initial abilities still play a role in overall achievement, the innovative use of MBSW offers a consistent advantage for all learners.

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