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l. Majapahit No. 62 Mataram, Nusa Tenggara Barat, Indonesia Lantai 2 gedung E, Program Studi S1 Pendidikan Matematika, FKIP Universitas Mataram
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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 380 Documents
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Learning Interest as a Predictor of Mathematics Achievement among Indonesian Junior High School Students Doni Sirait, Erlando; Dani Apriyani, Dwi; Ramdhan, Vickry; Erlangga, Fajar
Mandalika Mathematics and Educations Journal Vol 8 No 1 (2026): Edisi Maret
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i1.11389

Abstract

Programme for International Student Assessment (PISA) reported that many countries, including Indonesia, have not yet reached the expected levels of mathematics proficiency, highlighting the importance of examining internal factors such as students’ learning interest. This study aims to examine students’ learning interest and how it relates to and predicts their mathematics achievement. This quantitative correlational study involved 65 randomly selected seventh-grade students from SMPN 160 East Jakarta, Indonesia. Learning interest was measured using a validated 20-item questionnaire, and mathematics achievement was obtained from mid-semester test scores. Data were analyzed using descriptive statistics, Spearman’s correlation, and rank-based and multiple regression analyses in SPSS 27. The results showed that students generally had moderate levels of learning interest (M = 3.65) and mathematics achievement (M = 78.94). Learning interest was positively related to mathematics achievement (r = 0.64) and significantly predicted students’ mathematics performance (R² = 0.52), with persistence (p = 0.03) and attention (p = 0.04) being the strongest predictors. In conclusion, students’ persistence and attention are key factors in mathematics achievement, indicating that sustained focus and perseverance play a central role in improving mathematics performance.
Segmentasi Kecamatan di Kota Bandung Berdasarkan Statistik Penyandang Disabilitas Menggunakan Algoritma K-Means Clustering Rosni, Rosni; Fredella, Erinna; Rivai, Muklas
Mandalika Mathematics and Educations Journal Vol 8 No 1 (2026): Edisi Maret
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i1.11430

Abstract

People with disabilities continue to experience discrimination, stigmatization, and unfulfilled rights. The number of people with disabilities in Bandung City is the second highest in West Java Province. Various factors, including a disability-unfriendly environment, lack of accessibility to public infrastructure, and insufficient social support. This study aims to analyze and segment subdistricts in Bandung City based on disability statistics using the K-Means clustering algorithm. The types of disabilities analyzed include mental disabilities, physical disabilities, physical and mental disabilities, visual impairments, hearing impairments, and other types of disabilities. The results of the study showed that the optimal number of clusters, as determined by the Elbow method, is 2 clusters. A total of 18 subdistricts are classified into Cluster 1, characterized by a relatively lower number of persons with disabilities, while the remaining 12 subdistricts are classified into Cluster 2, which has a relatively higher number of persons with disabilities. The results of this segmentation are expected to support the realization of Bandung City as an inclusive city and to assist the government in developing more targeted policies and programs.
Pengembangan LKPD Berbasis Etnomatematika Permainan Tradisional Congklak untuk Meningkatkan Kemampuan Berpikir Kritis Siswa SMP Ningrum, Nicky Nastity Cahya; Handayani, Ucik Fitri
Mandalika Mathematics and Educations Journal Vol 8 No 1 (2026): Edisi Maret
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i1.11457

Abstract

Mathematics learning at the junior high school level is still predominantly abstract and has not sufficiently connected mathematical concepts with real-life contexts and local culture, resulting in students’ critical thinking skills not developing optimally. One effort to address this issue is through the development of contextual and meaningful ethnomathematics-based teaching materials. This study aims to develop an ethnomathematics-based Student Worksheet (LKPD) using the context of the traditional congklak game to improve junior high school students’ critical thinking skills. This research employed a research and development approach using the ADDIE model, which consists of the analysis, design, development, implementation, and evaluation stages. The research subjects were ninth-grade students of SMP Negeri 5 Satu Atap Sumbermanjing Wetan, selected through purposive sampling. Data were collected through expert validation, teacher and student response questionnaires, as well as pretest and posttest instruments. The expert validation results showed that the developed LKPD obtained a validity percentage of 85.3%, categorized as very valid. The practicality test results indicated percentages of 93.33% from teachers and 82.4% from students, categorized as very practical. The effectiveness test using a paired sample t-test revealed a Sig. (2-tailed) value of 0.000 < 0.05, indicating a significant improvement in students’ critical thinking skills after the implementation of the LKPD. Therefore, the ethnomathematics-based LKPD with the congklak game context is valid, practical, and effective in enhancing students’ critical thinking skills.
Humanisme dalam Pembelajaran Matematika di Era Digital: Telaah filosofis atas Ancaman Dehumanisasi Habiba, Siti; Alifiani
Mandalika Mathematics and Educations Journal Vol 8 No 1 (2026): Edisi Maret
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i1.11462

Abstract

Mathematics education in the digital era faces significant challenges, including the risk of dehumanization when students become overly dependent on technology, potentially hindering essential mathematical thinking, reasoning, and reflection. This article aims to philosophically examine mathematics education in the digital era from a humanistic perspective, particularly regarding the threat of dehumanization and efforts to preserve the human dimension in learning. A Systematic Literature Review (SLR) guided by PRISMA was conducted on national and international accredited journal articles from Scopus, ERIC, ResearchGate, SINTA, and Google Scholar published between 2017 and 2025, resulting in 10 relevant articles for thematic analysis. The findings indicate that humanistic philosophy positions students as whole individuals, emphasizes the teacher’s role as a dialogical companion and value guide, and views digital technology as a supportive tool rather than a replacement for human interaction. The study concludes that integrating humanistic values in digital mathematics education is essential to prevent dehumanization, strengthen character development, and ensure learning remains meaningful, ethical, and human centered.
Eksplorasi Etnomatematika pada Proses Pembuatan Jajanan Tradisional Kue Putu di Poncokusumo Kabupaten Malang Zulfaa, Indanaa; Awantagusnik, Annafi
Mandalika Mathematics and Educations Journal Vol 8 No 1 (2026): Edisi Maret
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i1.11510

Abstract

To address the problem of abstract mathematics learning, a learning approach is needed that connects mathematical concepts to students' real-life contexts. One approach that could provide a solution is ethnomathematics. This study aims to explore the ethnomathematics concept found in the process of making traditional Putu cake and analyze its potential as a mathematics learning medium in Junior High Schools. This study uses a descriptive qualitative method with an ethnographic approach. Data collection was conducted through observation, semi-structured interview with two Putu cake makers and sellers, and documentation at the production site in Sukosari, Pandansari, Poncokusumo, Malang Regency. Data analysis was carried out qualitatively through three stages, namely data reduction, data presentation, and drawing conclusions. The results of the study indicate that each stage of Putu cake making contains mathematical concepts. In the stages of preparing ingredients and making dough, the concepts of spherical geometry, number operations, and comparisons were found through adjusting the measurements of ingredients based on the production quantity. The stages of forming and filling the dough into the mold contain the concepts of cylindrical geometry and hollow cylinder geometry as shown by the uniformity of the size of the bamboo mold. In the steaming stage, the concept of ratio and comparison between mold size and steaming time was found, while in the presentation and packaging stage, the concept of cylindrical geometry reappeared in the final form of Putu cake. Based on these findings, Putu cake has strong potential to be developed as a contextual and local culture-based mathematics learning medium in junior high schools for the material of numbers, ratios, and geometry. Using Putu cake as a learning medium allows students to understand mathematical concepts through real-life experiences while fostering an appreciation for local culture. Further research is recommended to test the effectiveness of using Putu cake as a medium for learning mathematics in the classroom.
Pengaruh Kecemasan Matematika dan Prokrastinasi Akademik Terhadap Hasil Belajar Siswa Nailussulha, Inas Nada; Hikmah, Nurul; Novitasari, Dwi
Mandalika Mathematics and Educations Journal Vol 8 No 1 (2026): Edisi Maret
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i1.10808

Abstract

This study aims to determine the effect of mathematics anxiety and academic procrastination on the learning outcomes of eighth-grade students at a public junior high school in West Lombok regarding exponents during the 2025/2026 academic year. This research employed a quantitative approach using the ex-post facto method. The sample consisted of 55 students selected through a simple random sampling technique. The research instruments included a mathematics anxiety questionnaire, an academic procrastination questionnaire, and a mathematics achievement test. Data were analyzed using simple and multiple linear regression with the assistance of SPSS. The results showed that mathematics anxiety had a negative and significant effect on students’ learning outcomes, with a significance value of 0.006 < 0.05 and a regression coefficient of –1.008. Academic procrastination also had a negative and significant effect, with a significance value of 0.046 < 0.05 and a regression coefficient of –1.314. Simultaneously, both variables significantly affected learning outcomes, as indicated by an F-value of 16.239 and a significance value of 0.000 < 0.05. The coefficient of determination (R2) was 0.384, indicating that 38.4% of the variation in learning outcomes was explained by mathematics anxiety and academic procrastination, while the remaining 61.6% was influenced by other factors beyond this study. These findings emphasize the important role of affective and behavioral factors in supporting students’ mathematics achievement.
Efektivitas Strategi Pembelajaran Terdiferensiasi terhadap Pemahaman Konsep Siswa pada Matematika Matriks Qoffal, Abdul Mannan; Sunismi
Mandalika Mathematics and Educations Journal Vol 8 No 1 (2026): Edisi Maret
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i1.10934

Abstract

Many students have difficulty understanding mathematical concepts because learning is still quite teacher-centred and does not pay attention to individual learning needs. Differentiated learning is seen as being able to overcome this problem by adjusting content and processes according to students' abilities and learning styles. This study aims to determine the effectiveness of differentiated learning in improving the mathematical concept understanding abilities of grade XI students at SMK Al Khozini Gondanglegi in the subject of matrices. This study used a quantitative method with a quasi-experimental design of the pretest and posttest control group type. The sample consisted of two classes, namely the experimental class with differentiated learning and the control class with conventional learning. Data were obtained from concept comprehension tests and analyzed using statistical tests. The results showed a significant increase in the experimental class with an average post-test score of 82.69 and an N-Gain of 0.57, which was higher than the control class with a post-test score of 68.42 and an N-Gain of 0.51. The t-test also showed a significant difference between the two classes (sig. 0.000 < 0.05). Thus, differentiated learning proved to be more effective than conventional learning in improving students' mathematical concept understanding of matrix material.
Pemodelan Premi Asuransi Jiwa Dwiguna Unit Link dengan Metode Annual Ratchet dan Hukum Gompertz Ratam, Aldila Nur Indah Berliana; Marisa; Irawan, Agus; Nasrullah
Mandalika Mathematics and Educations Journal Vol 8 No 1 (2026): Edisi Maret
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i1.11061

Abstract

The risk of death is one of the risks that can have a significant impact on an individual’s financial condition. Therefore, protection through life insurance is required. Unit-linked endowment life insurance combines protection and investment benefits, with the premium amount affecting both. This study is a quantitative research with an actuarial modeling approach that aims to model the premium of unit-linked endowment life insurance based on stock investment using the annual ratchet method and Gompertz’s law. Stock returns and volatility are used as the basis for determining investment benefits under the annual ratchet method, using stock data for PT Bank Central Asia Tbk. The annual ratchet method is applied to protect the investment value from market declines by implementing cap and floor limits. Survival and mortality probabilities are modeled using Gompertz’s law. The results of the study show that, based on mortality modeling using Gompertz’s law and the annual ratchet mechanism, the net single premium for unit-linked endowment life insurance that must be paid at the beginning of the contract was Rp 129,098,509. These results show that applying the annual ratchet method can protect against fluctuations in investment value while accounting for mortality risk in premium determination, making the resulting model an alternative for developing more stable unit-linked life insurance products.
Penerapan pembelajaran model kooperatif yang mengoptimalkan kecerdasan majemuk untuk meningkatkan prestasi belajar trigonometri pada mahasiswa universitas muhammadiyah bone Trisnowali MS, Andi; Andini, Andi Cahaya Rezky; Talib, Ahmad
Mandalika Mathematics and Educations Journal Vol 8 No 1 (2026): Edisi Maret
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i1.11070

Abstract

This study aims to determine the improvement of students’ learning achievement and to examine their responses toward the implementation of a cooperative learning model based on interpersonal and logical-mathematical intelligences in the Trigonometry course. This research employed a quantitative approach with a one-group pretest–posttest design. The subjects consisted of 19 students who were taught using the cooperative learning model over several meetings. Data were collected through achievement tests, student response questionnaires, and learning implementation observation sheets. The results showed that the students’ average achievement score increased from 68.42 to 85.26, with the Wilcoxon Signed Rank Test (Z = -3.922; p < 0.000) indicating a significant difference between the pretest and posttest scores. The N-Gain value of 0.533 fell into the moderate category, indicating that the cooperative learning model was quite effective in improving student achievement. Furthermore, the average student response (85) and learning implementation score (89.47) were both in the very high category, suggesting a positive attitude toward the learning model. Therefore, the implementation of a cooperative learning model based on interpersonal and logical-mathematical intelligences was proven effective in improving student achievement and active engagement in learning Trigonometry.
Strategi Peningkatan Hasil PISA Level 2 berbasis Analisis Kesalahan Change and Relationships Siswa SMP Husain, Husriani; Ali, St. Nur Khalifah; Rahman, Abdul; Bernard, Bernard
Mandalika Mathematics and Educations Journal Vol 8 No 1 (2026): Edisi Maret
Publisher : FKIP Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jm.v8i1.11095

Abstract

Indonesian students' mathematical literacy in PISA assessments remains low,particularly in the Change and Relationships content area. Most existing studies are quantitative and therefore have not revealed the cognitive processes underlying student errors. This study aims to analyze errors and problem-solving strategies of eighth-grade students in solving PISA Change and Relationships Level 2 problems using the PISA mathematical literacy framework (formulate–employ–interpret). A qualitative case study approach was employed,involving 15 eighth-grade students from SMP Al Wildan Islamic School 22 Makassar. The test instrument consisted of three PISA Level 2 tasks with contexts of goods pricing, intravenous drip rate,and currency exchange. Six students were selected through purposive sampling for in-depth interviews. Data were collected through diagnostic tests, semi-structured interviews,and documentation of student work,then analyzed using source triangulation. Results show that average answer accuracy is only 44.4%,with three consistently identified error categories: representation and modeling errors at the formulate stage, procedural errors at the employ stage,and absent result verification habits at the interpret stage. Successful students demonstrate relational understanding and strong metacognitive awareness. This study contributes a specific error mapping per PISA mathematical literacy stage for Change and Relationships Level 2 content,along with operationally distinct intervention recommendations for each error category

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