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Mandalika Mathematics and Educations Journal
Published by Universitas Mataram
ISSN : 27158292     EISSN : 27151190     DOI : 10.29303/jm
Core Subject : Education,
Mathematics
Mandalika Mathematics and Education Journal adalah Jurnal Matematika dan Pendidikan Matematika yang dikelola oleh Program Studi S1 Pendidikan Matematika FKIP Universitas Mataram. Fokus dan ruang lingkup dari jurnal ini adalah artikel ilmiah baik berupa hasil penelitian, review artikel maupun kajian pustaka khusus bidang Matematika dan Pendidikan Matematika.
Arjuna Subject : Matematika - Matematika (Lain-Lain)
Articles 513 Documents
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Prediksi Gaya Belajar Selmes Melalui Kemampuan Berpikir Aljabar Menggunakan Analisis Diskriminan Linear Rashieka Widyarini Suryoputro; Karunia Eka Lestari; Ekasatya Aldila Afriansyah
Mandalika Mathematics and Educations Journal Vol 8 No 3 (2026): Edisi September
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i3.12706

Abstract

Learning styles can be associated with mathematical abilities, particularly algebraic thinking ability, where variations in students abilities may indicate differences in their learning styles. This study aims to predict Selmes learning styles based on algebraic thinking ability using Linear Discriminant Analysis (LDA). This research employed a quantitative approach conducted among 7th and 8th grade students at SMP Islam Teratai Putih Global. The sample consisted of 57 students selected using a simple random sampling technique. The research instruments included an algebraic thinking ability test and the Selmes learning style questionnaire, which classified into five categories: surface, deep, hard work, organisation, and motivation. The data were analyzes using LDA to predict students learning styles according to Selmes theory based on their algebraic thinking ability. The result showed that the model generated discriminant functions and posterior probability that were used to determine prediction outcomes. Furthermore, the test results indicated that the discriminant model was statically significant in predicting Selmes learning styles based on algebraic thinking ability. The model performance evaluation demonstrated that the model achieved relatively good performances in terms of accuracy, macro average precision, and macro average F1-Score. However, the macro average recall indicated that the model performance still requires further improvement.
Model Team Accelerated Instruction (TAI) dengan Pendekatan Open-Ended Efektif Ditinjau dari Kemampuan Penalaran dan Self-Efficacy Siswa Tri Andriyani; Raden Rosnawati
Mandalika Mathematics and Educations Journal Vol 8 No 3 (2026): Edisi September
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i3.12707

Abstract

The purpose of this study is to describe the differences in the effectiveness of the TAI cooperative learning model with an open-ended approach and the conventional learning model in terms of students’ mathematical reasoning abilities and self-efficacy. This study is a quasi-experimental study using a nonequivalent comparison group design. The subjects of this study were 10th-grade students at a public high school in Yogyakarta. The sample consisted of two classes, each of which followed the TAI-type cooperative learning model with an open-ended approach and conventional learning, respectively. The research instruments consisted of a reasoning ability test and a self-efficacy scale. Data analysis techniques included descriptive and inferential analysis. The results of the study at a 5% significance level indicate that: 1) the TAI cooperative learning model with an open-ended approach is effective in terms of students’ mathematical reasoning ability and self-efficacy; 2) the conventional learning model is effective in terms of students’ mathematical reasoning ability and self-efficacy; 3) the TAI-type cooperative learning model with an open-ended approach is more effective than the conventional learning model in terms of students’ mathematical reasoning ability; however, there is no difference in effectiveness between the two models in terms of students’ self-efficacy.
Analisis Model Antrean Pada Pelayanan Point Coffee di Indomaret Fresh Ahmad Yani Nomor 47 Leasy Sudibyo; Dinar Nirmalasari
Mandalika Mathematics and Educations Journal Vol 8 No 3 (2026): Edisi September
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i3.11583

Abstract

The rapid growth of grab-and-go coffee services in modern retail has increased customer traffic, making queue management a critical factor in maintaining service quality. This study analyzes the performance of the queuing system at Point Coffee in Indomaret Point using a multi-server queuing model . The objective of this study is to evaluate the current operational condition and propose an optimal service capacity improvement scenario. Data were collected through  hours of observation, involving a total of  customers. The modeling results showed that the current single-server system  produces an average waiting time of  minutes and a server utilization rate of , indicating that the system operates near its maximum capacity. Simulation results using two servers  showed a significant reduction in average waiting time to  minutes, with a server utilization rate of  for each server. Although the addition of a third server (M/M/3) resulted in the best theoretical performance, the improvement in efficiency was relatively small compared to the additional resources required. Therefore, this study concludes that adding one server during peak operational hours is the most efficient strategy for improving service quality.
Eksplorasi Etnomatematika Tradisi Upacara Adat Masyarakat di Kabupaten Kebumen Afsya Meylaningsih; Erni Puji Astuti; Arya Bagaskara; Wahyu Widodo
Mandalika Mathematics and Educations Journal Vol 8 No 3 (2026): Edisi September
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i3.11829

Abstract

The limited application of mathematics in cultural contexts as a learning resource results in instruction that tends to be abstract and lacking context for students. This study explores ethnomathematics within the traditional Haul Syekh Ibrahim Asmoroqondi ceremony in Kuwarisan Village, Kebumen Regency. Using a qualitative ethnographic approach, it reveals cultural values rich in mathematical meaning, particularly in the Ingkung Suran tradition held every Friday Kliwon during the month of Muharram or Suro. Data were collected through participant observation, interviews, and document analysis, with informants consisting of community leaders and managers of the Kebumen Geopark.The findings show that number concepts appear in community counting activities, number sequences in the philosophy of charity, mixed operations in the “dhahar kembul” activity, and the least common multiple in determining the ceremony date. These findings demonstrate that local culture can serve as a meaningful source of mathematics learning while preserving local wisdom. Based on these results, it is recommended that culture-based learning materials be developed to enhance students’ mathematical understanding in a contextual manner aligned with their daily live.
Analisis Numerik Model Predator-Mangsa dengan Transmisi Penyakit yang Bergantung pada Suhu Arrival Rince Putri; Muhammad Farhan Bunayya; Muhafzan Muhafzan
Mandalika Mathematics and Educations Journal Vol 8 No 3 (2026): Edisi September
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i3.11952

Abstract

This research aims to formulate and analyze a four-dimensional non-linear mathematical predator-prey model that integrates the impacts of environmental temperature variation on prey growth, horizontal disease transmission of mass-action type, and quarantine actions on infected prey. The research method used is pure analytical research to determine equilibrium points, supported by numerical simulations using the fourth-order Runge-Kutta method. The results identify four biological equilibrium points: disease-free without predator, disease-free with predator, endemic without predator, and endemic with predator. Numerical simulations show that a linear temperature rise up to an extreme of 35℃ drastically reduces prey growth rate, lowering prey density below the transmission threshold and naturally eliminating the pathogen, but triggering predator extinction due to the loss of food supply. In conclusion, quarantine actions act as an effective functional refuge in maintaining predator survival, indicating that conservation policies must integrate population health management and global warming mitigation.
Kesulitan Siswa Kelas IX pada Literasi Numerasi Statistika: Studi Kasus Soal Kontekstual Zulfa Nur Jannah; Ida Adzkarina; Ulya Sa'idah
Mandalika Mathematics and Educations Journal Vol 8 No 3 (2026): Edisi September
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i3.12149

Abstract

This study aimed to describe the numeracy literacy difficulties faced by grade IX students when solving contextual statistical problems. Using a descriptive qualitative design, the study involved eight junior high school participants from Ngawi Regency selected via purposive sampling. Data collection relied on written tests, semi-structured interviews, and documentation. The test comprised three contextual essay questions designed according to Han Weilin’s numeracy literacy indicators: the ability to use numbers and symbols, analyze data, and interpret conclusions. To ensure data validity, technical triangulation was performed by cross-checking the test papers with the interview transcripts. Data were then analyzed using the Miles and Huberman model, which includes data reduction, data display, and conclusion drawing. The analysis revealed that although students possessed adequate basic computing skills, their performance dropped during further data analysis and interpretation. The specific errors identified were a high dependency on calculators and AI tools, lack of accuracy in processing data, misconceptions regarding statistical concepts, and an inability to formulate context-appropriate conclusions. These issues were driven by several key factors, including a strictly procedural understanding of mathematics, low reading literacy, and a lack of self-confidence in independent thinking.
Eksplorasi Proses Pemecahan Masalah Statistika Mahasiswa dalam Pembelajaran Etnomatematika Berbasis Kearifan Lokal Yulia Nurrahmawati; Heriyanto; Ewan Gunawan
Mandalika Mathematics and Educations Journal Vol 8 No 3 (2026): Edisi September
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i3.12167

Abstract

Abstract This study is motivated by the low ability of students in solving statistical problems due to abstract and less contextual learning approaches. This study aims to explore students’ statistical problem-solving processes through ethnomathematics-based learning integrated with local wisdom. This research employed a qualitative approach with a case study design. The subjects were students enrolled in a statistics course, selected purposively. Data were collected through observation, in-depth interviews, and documentation. Data analysis was conducted through data reduction, data display, and conclusion drawing. The results indicate that students find it easier to understand problems when presented in the context of local wisdom; however, they still face difficulties in planning strategies, executing solutions accurately, and reflecting on their results. The study concludes that ethnomathematics-based learning with local wisdom supports students’ contextual understanding in statistical problem solving, but it needs to be complemented with conceptual reinforcement and reflective skills development. Keywords: Ethnomathematics; Problem Solving; Statistics; Local Wisdom.
Pengaruh Model Pembelajaran Problem Based Learning (PBL) berbantuan KoMa (Komik Matematika) Terhadap Kemampuan Literasi Numerasi Siswa SMP Yohana Dameria Sianturi; Elfitra Elfitra
Mandalika Mathematics and Educations Journal Vol 8 No 3 (2026): Edisi September
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i3.12204

Abstract

This study aimed to examine changes in numeracy literacy ability after the implementation of the Problem Based Learning (PBL) model assisted by KoMa (Mathematics Comics) in the form of a student worksheet (LKPD) among seventh-grade students at SMP Negeri 6 Tanjung Morawa. The study employed a quantitative pre-experimental method with a one-group pretest-posttest design. The population consisted of 99 seventh-grade students, while the sample was 33 students of class VII-2 selected purposively. Data were collected using a numeracy literacy essay test and a student response questionnaire. The test consisted of three essay items representing three numeracy literacy indicators: using numbers and mathematical symbols in everyday contexts, analyzing information presented in various representations, and interpreting analytical results to make predictions or decisions. Descriptive analysis showed that the mean pretest score was 9.03 (SD = 2.73) and the mean posttest score was 18.52 (SD = 5.91), with an average increase of 9.49 points. The normality test of the paired difference scores indicated normal distribution (Shapiro-Wilk, p = 0.135). A paired-samples t-test showed a statistically significant difference between pretest and posttest scores, t(32) = 11.359, p < 0.001. The largest improvement by indicator occurred in interpreting analytical results for prediction and decision making, followed by the use of numbers and symbols and analysis of information. The findings indicate that numeracy literacy ability increased after the PBL assisted by KoMa intervention; however, because the study used a single group without a comparison group, the result should not be interpreted as definitive causal evidence.
Pengaruh Layanan Bimbingan Belajar Terhadap Kepercayaan Diri dan Prestasi Belajar Matematika Siswa Pahima Pahima; Arjudin Arjudin; Ulfa Lu'luilmaknun
Mandalika Mathematics and Educations Journal Vol 8 No 3 (2026): Edisi September
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i3.12206

Abstract

This research aims to know the effect of tutoring service on students' self-confidence and mathematics learning achievement. This research uses a quantitative approach with a causal-comparative method (ex post facto). The population is all grade 9 students. The sample uses saturation sample of 51 students (17 students in the tutoring group and 34 students in the non-tutoring group). The instruments are a self-confidence questionnaire with 17 items and a mathematics achievement test. The test has four essay questions about the volume of prisms and pyramids, and probability. The data analysis uses the independent sample t-test. The results show that tutoring service has a significant effect on self-confidence (p = 0.000; average: tutoring = 56.235 [82.70%], non-tutoring = 47.294 [69.55%]; effect size d = 1.934, large category). Also, tutoring service has a significant effect on mathematics learning achievement (p = 0.037; average: tutoring = 76.941 [76.94%], non-tutoring = 61.880 [61.88%]; effect size d = 0.651, medium category). In conclusion, tutoring service affects students' self-confidence and mathematics learning achievement.
Students’ Problem-Solving Ability in Systems of Linear Equations in Two Variables Viewed from Cognitive Styles at SMPN 1 Mataram in the Academic Year 2025/2026 Haris Hidian Ihsani; Nani Kurniati; Ratna Yulis Tyaningsih
Mandalika Mathematics and Educations Journal Vol 8 No 3 (2026): Edisi September
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i3.12232

Abstract

Penelitian ini bertujuan untuk mendeskripsikan kemampuan pemecahan masalah siswa pada topik Sistem Persamaan Linear Dua Variabel (SLETV) berdasarkan gaya kognitif, yaitu Field Independent (FI) dan Field Dependent (FD). Penelitian ini menggunakan pendekatan kualitatif dengan desain penelitian deskriptif. Subjek penelitian ini adalah enam siswa kelas sembilan SMP Negeri 1 Mataram yang dipilih menggunakan purposive sampling berdasarkan hasil Group Embedded Figures Test (GEFT), terdiri dari tiga siswa FI dan tiga siswa FD. Data dikumpulkan melalui tes soal cerita pada topik SLETV dan wawancara. Analisis data dilakukan melalui reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian menunjukkan bahwa siswa dengan gaya kognitif Field Independent memiliki kemampuan pemecahan masalah yang lebih baik dalam menyelesaikan masalah kontekstual berdasarkan tahapan Polya, yaitu memahami masalah, merancang rencana, melaksanakan rencana, dan meninjau solusi. Sementara itu, siswa dengan gaya kognitif Field Dependent cenderung mengalami kesulitan dalam memahami masalah dan merancang strategi yang tepat. Oleh karena itu, gaya kognitif memengaruhi kemampuan pemecahan masalah siswa dalam menyelesaikan masalah SLETV. Keywords: problem-solving ability; systems of linear equations in two variables; cognitive style; field independent; field dependent

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