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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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Bibliometric analysis: Spatial skills and gender in education Raditya, Aji; Syazali, Muhamad
Desimal: Jurnal Matematika Vol. 7 No. 1 (2024): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v7i1.23211

Abstract

Spatial skills, the ability to perceive, understand, and manipulate shapes and spatial relationships, are fundamental to human cognition and have a significant impact on success in STEM (Science, Technology, Engineering, and Mathematics) career. The purpose of this study is to analyze the scientific research related to spatial skills and gender in education on Scopus database. This research also reveals the current research trends and research gaps on this subject. Bibliometric analysis is used to answer those objectives, with platforms such as R packages (Bibliometrix) and Vos Viewer software to help the analysis. This study addresses four research issues as follows: (i) the landscape of research on spatial skills and gender; (ii) the leading countries and institutions on spatial skills and gender research; (iii) the most cited journal; and (iv) the most cited authors; (v) the most cited articles; (vi) the most popular and least popular keywords.
Analysis of students' mathematical literacy ability in solving hots questions in view of learning style Agustina, Marlita Dwi; Khotimah, Rita Pramujiyanti
Desimal: Jurnal Matematika Vol. 7 No. 2 (2024): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v7i2.23397

Abstract

Mathematical literacy is a person's ability to formulate, use and interpret mathematics. The purpose of the study in this article is to analyze students' mathematical literacy in solving HOTS questions about SPLDV materials based on students' learning styles. This type of research is qualitative ethnography. The subject of the study, eighth grade students of SMP Negeri 2 Karanganyar. Data collection techniques are observation, interview and documentation. Validity of data, triangulation of sources and methods. Data analysis techniques, flow methods. This research uses six basic skills of mathematical literacy, namely communication skills, mathematization, representation, determining problem-solving strategies, using operational language and symbols, formal language and technical language, as well as reasoning and giving reasons. The results of the study show that visual learning style students can use six basic mathematical literacy skills in solving HOTS questions in SPLDV, kinesthetic learning style students can use 5 basic mathematical literacy skills in solving HOTS questions in SPLDV. level, and students who have a kinesthetic learning style can use the 5 basic skills of mathematical literacy in solving SPLDV level HOTS questions.
The influence of the creative problem solving learning model on the mathematical problem solving ability of high school students on linear inequations Sinulingga, Sintya Lestari; Harahap, Amin; Hasibuan, Lily Rohanita
Desimal: Jurnal Matematika Vol. 7 No. 2 (2024): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v7i2.23424

Abstract

A student's ability to solve math problems is very, very low because in solving math problems, the learning process does not accustom students to think more creatively. This is because the learning process in the teacher's class still applies conventional methods, and the students in the class have not yet achieved scores above the KKM. This study aims to see the Creative Problem Solving learning model as a series of learning in solving and solving problems systematically based on student creativity to produce effective solutions. This research is a quasi-experimental research using purposive sampling technique. The instrument used in this research is a test of the ability to solve mathematical problems in the form of a written test, a result test and an observation sheet on the implementation of the learning process. The data analysis techniques used are descriptive statistical analysis and inferential statistical analysis. The results of the study show that the mathematics learning of students using the CPS learning model on the ability to solve mathematical problems of students is better than the results of mathematical learning of students who have followed conventional learning which means that there is an influence of creative problem solving learning on the ability to solve mathematical problems of high school students regarding linear inequalities .
Modeling tuberculosis in children under five using poisson and negative binomial regression Fajri, Ahmad; Rahmi, Nur; Maharani, Putri Ayu; Amal, Muhammad Ikhlashul
Desimal: Jurnal Matematika Vol. 7 No. 2 (2024): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v7i2.23464

Abstract

Tuberculosis is an infectious disease caused by Mycobacterium tuberculosis. Indonesia is the country with the second highest number of tuberculosis cases after India. The Ministry of Health stated that there has been a significant increase in cases of tuberculosis among children in Indonesia where the increase in cases of tuberculosis among children has reached more than 200 percent. The number of TB cases can be reduced if the factors that affect the number of TB patients are known. Therefore, efforts should be made to model the number of cases of Tuberculosis among children under five years of age to provide useful information to prevent and control Tuberculosis. The relationship between these factors and the number of people with Tuberculosis can be determined using Poisson regression analysis because the number of cases of Tuberculosis is calculated data. Tuberculosis data contain overdispersion, so another approach is used to overcome it, which is by using a negative binomial regression model. The best model obtained based on the AIC value is the Negative Binomial regression model with an AIC value of 184.095. For further research, it is suggested to test the spatial effect and modeling using the Negative Binomial geographic weighted regression method to find out whether the characteristics of one region and the other influence the geographic location on the model.
Markovian modelling of transmission of tuberculosis cases in Indonesia Anggraeni, Andini Setyo; Jabnabillah, Faradiba
Desimal: Jurnal Matematika Vol. 7 No. 2 (2024): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v7i2.23477

Abstract

Indonesia is ranked as the second highest contributor to global cases of Tuberculosis (TB), which requires a focused approach to the transmission of tuberculosis within the country. This research aims to model and analyze the spread of TB cases in Indonesia. This research uses a discrete-time Markov chain with S-I-T-R-D states and Maximum Likelihood Estimation to model the transmission of TB cases. This research provides innovation in modeling the transmission of TB cases with a more complex model by including the possibility of relapse and treatment outcomes using historical data of TB cases in Indonesia. This research produces a matrix of transition probabilities for each state, first transition probabilities, steady state states, expected times for each transition and lifetime.
High school students’ justification to solve algebraic mathematics reasoning problems: Descriptive analysis from the nature of justification tasks Razi, Fakhrur
Desimal: Jurnal Matematika Vol. 7 No. 3 (2024): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v7i3.23504

Abstract

Justification serves as a tool used to improve students' ability to understand mathematics and their proficiency in working on mathematical problems. However, despite its significance, student justification in the problem-solving process has not become a priority for teachers based on several studies. While justification research related to problem-solving has begun to develop, it is only limited to validating the truth of a mathematical solution. Thus, this qualitative descriptive research aims to analyze students' justification process in solving reasoning problems regarding the types of justification (interpretation, elaboration, prediction, and validation) and the function of each type. The research subjects consisted of two high school students in Indonesia with high abilities who solved algebraic mathematics reasoning problems. Meanwhile, data collection and analysis used the results of students solving algebraic reasoning problems involving the nature of justification tasks. The results show that the types of justification indicate a crucial role in students' problem-solving process. Apart from that, each of these also has the potential for use in the problem-solving process. Furthermore, this article also suggests several points that can be applied to develop student justification in reasoning algebraic problems.
Developing an augmented reality based interactive module for lessoning curvent side space building Sabrina, Agtya Jacklione; Sumardi, Sumardi
Desimal: Jurnal Matematika Vol. 7 No. 2 (2024): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v7i2.23512

Abstract

In previous research, it was found that the incorporation of AR technology has the potential to improve the way people learn in curved spaces and make it easier for students to visualize shapes. This makes a solution to the problem of students found by researchers in the field that students find it difficult when learning curved spaces without the help of props. However, students also say that the use of physical form props is not practical to use. Therefore, the goal of this research is to develop valid, effective, and practical augmented reality-based interactive learning materials for use in curved space learning. This product is developed using the ADDIE model. Data were collected through student response questionnaire instruments and pre-test post-test questions. Data analysis was conducted to determine the validity of the product using the Aiken Value, the level of effectiveness obtained through the n-gain score, and practicality using the mean value and TCR of the student response questionnaire score. It was found that the product was classified in the "high validity" category from material experts as well as media experts. For the level of product effectiveness, the results obtained are "moderately effective" and for the level of practicality, the product is declared to have "good" practicality.
The effect of game based learning with math bingo in reducing math anxiety to improve students’ mathematics learning outcomes in data presentation materials Ayyasy, Hafidz Yahya; Asrul, Asrul
Desimal: Jurnal Matematika Vol. 7 No. 2 (2024): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v7i2.23546

Abstract

This study aims to examine the effects of game-based learning with Math Bingo in reducing math anxiety and improving student learning outcomes. The research method used is pre-experimental with a pre-post test design of one group. Math anxiety data was collected using questionnaires before and after the intervention, while math learning outcomes data were obtained through pre-test and post-test. results of data analysis obtained sig. (2-tailed) of 0.001<0.05. Therefore, it can be concluded that game-based learning with Math Bingo is effective in reducing anxiety and improving students' math learning outcomes. This finding shows that game-based learning with Math Bingo is effective in reducing anxiety and improving students' math learning outcomes. The implication of this study is the importance of integrating game-based learning in mathematics learning to create a more interactive and interesting learning environment, as well as the need for support from curriculum developers and educational policies for the wider implementation of this method.
The effect of cooperative learning model of think pair share with group advisor strategy on students' mathematics learning achievement on number pattern material Ningsih, Wanda Suhari; Pasaribu, Laili Habibah; Harahap, Amin
Desimal: Jurnal Matematika Vol. 7 No. 2 (2024): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v7i2.23577

Abstract

This study aims to analyze the effect of the Think Pair Share (TPS) cooperative learning model combined with the Group Advisor strategy on students' mathematics learning achievement at MTs Al-Ittihad. The research method used is an experiment with a pre-post-test design in one group. Data was collected through mathematics learning achievement tests given before and after treatment, as well as interviews to obtain qualitative data about students' experiences when applying this learning model. Data analysis was conducted using a t-test to determine the difference in learning achievement before and after treatment. The results of the study show that there is a significant increase in student mathematics learning achievement after the application of the TPS model with the Group Counseling strategy. This finding shows that the application of the TPS cooperative learning model with the Group Advisor strategy is effective in improving students' mathematics learning achievement at MTs Al-Ittihad. This study provides empirical evidence that the TPS cooperative learning model with the Group Advisor strategy can be considered by teachers as an effective alternative in efforts to improve the quality of mathematics learning.
Unveiling the connection: Emotional intelligence and reflective thinking in students’ PISA problem-solving Anggraini, Intan; Faiziyah, Nuqthy
Desimal: Jurnal Matematika Vol. 7 No. 2 (2024): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v7i2.23631

Abstract

Based on an international survey, Indonesian students face challenges in mathematics, ranking 64th out of 65 countries in 2012 and 72nd out of 79 in 2018. This research investigates how reflective thinking and emotional intelligence impact students' ability to solve math-based problems. PISA. Conducted with 40 eighth grade students from SMP Negeri 2 Selogiri, this study uses qualitative descriptive methods, including emotional intelligence questionnaires, reflective thinking tests with PISA questions, and interviews. Participants were divided into high, medium and low emotional intelligence groups. Findings show that students with high emotional intelligence (NHR) excel in all indicators of reflective thinking (response, elaboration, contemplation). Those with moderate emotional intelligence (TMP) meet the cues for reaction and elaboration but struggle with rumination. Students with low emotional intelligence (FTA) only achieve response indicators, having difficulty with elaboration and reflection. The study suggests that higher emotional intelligence improves reflective thinking and problem-solving skills, highlighting the need for targeted improvements in Indonesia's mathematics education system.

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