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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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Can definite integral solve the 'aul problem? Musthofa, Muhammad Wakhid; Malahayati, Malahayati
Desimal: Jurnal Matematika Vol. 5 No. 2 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i2.12417

Abstract

There is a similarity in concept between 'aul and the definite integral. 'Aul deals with the issue of the quantity of inheritance which must be divided into smaller quantities in order to be handed over to the heirs, while definite integral relates to the problem of calculating the broad of an area by dividing the area into smaller ones, followed by summing up the broad of each area. Achmad Yani used the definite integral to solve the problem of 'aul. But, in our opinion, the concept he used was wrong and there were still some errors in the construction that he described. This article aims to provide some corrections to such errors and provide some notes that as far as our research, the definite integral has not been able to be used in solving the problem of 'aul yet.
Mathematical creative thinking ability: The impact of adversity quotient on triangle and quadrilateral shapes material Rizalno, Slamet Mey; Purwanto, Sigid Edy
Desimal: Jurnal Matematika Vol. 5 No. 2 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i2.12642

Abstract

This research has a background, namely the ability to think mathematical creatively. This is because students pay less attention to the mathematics learning process. This will have an impact on the ability to think creatively in mathematics so that it will not develop properly. Adversity Quotient is the creative thinking ability of a student who can solve problems well if supported by good solving skills. The purpose of this research is to see the creative thinking ability of students in terms of the adversity quotient. The method in this research is descriptive qualitative research with an interview process. Data collection in this research is in the form of instrument questions that contain indicators of creative thinking, namely fluency, flexibility, originality, and elaboration. The results of the research were seen from the results of the answers to the questions on the mathematical creative thinking ability instrument and the adversity quotient, which contained that students had three types of adversity quotient, namely Climbers, Campers, and Quitters. Subjects with indicators of fluency, flexibility, originality, and elaboration with the Climbers type were able to solve the questions according to each indicator, the Campers type students were able to solve the questions correctly but were still lacking in preparing answers, and the Quitters type students still did not understand how to solve the questions so that the answer was wrong.
Forecasting the number of food and beverage industries using trend-adjusted exponential smoothing in Banyuwangi after pandemic covid-19 Darmawan, Randhi Nanang
Desimal: Jurnal Matematika Vol. 5 No. 2 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i2.12782

Abstract

The development of the tourism industry in Banyuwangi before the COVID-19 pandemic was quite rapid, including the food and beverage industries, but when the COVID-19 pandemic hit, it impacted the number of tourists in Banyuwangi decreasingly, and this had a significant impact on various economic sectors. However, interesting data showed that the number of food and beverage industries can be said to be stable during COVID-19, the trend indicated that there will be an increase in the number of the food and beverage industries after the pandemic subsides. In line with the Banyuwangi Rebound program, it is likely that the quantity of food and beverage industries will increase. Then, based on this phenomenon, the aim of this research was to forecast the number of food and beverage industries in Banyuwangi using the trend-adjusted exponential smoothing method. The accuracy and feasibility of forecasting results were measured based on the Mean Absolute Percentage Error (MAPE) and Tracking Signal (TS) values. The obtained forecasting model will be used to forecast the growth of the food and beverage industries in 2022, 2023, 2024, and 2025. The results of this research obtained that a forecasting model , with the results of forecasting the number of the food and beverage industries in Banyuwangi were 547 in 2022, 561 in 2023, 576 in 2024, and 589 in 2025. The average MAPE value for each forecasting result was 37.87% and the average TS value was 0.225, so it was included in the category of feasible to be used.
Problem based learning and self-regulated learning: Impact on mathematical reasoning ability in the circle material Pradini, Meysah Rani; Lusiana, Lusiana; Kesumawati, Nila
Desimal: Jurnal Matematika Vol. 5 No. 3 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i3.12807

Abstract

This research aims to see the effect of the problem-based learning model on mathematical reasoning abilities based on students' self-regulated learning on the circle material. The method used in this research is an experimental method (quantitative) with a  factorial design. The sampling technique in this research is cluster random sampling. Data collection techniques used in this research include tests to measure mathematical reasoning abilities and questionnaires to measure self-regulated learning. Based on the results of the research data analysis, it was concluded that there was an effect of the PBL model on students' mathematical reasoning abilities which was carried out through the overall final test and there were differences in the results of the reasoning ability tests and SRL given the PBL and conventional models. There are differences in mathematical reasoning abilities based on self-regulated learning, from the results of calculations using the two-way ANOVA test, while the interaction between the learning model and self-regulated learning of SMP Negeri 15 Palembang students is not found or there is no interaction.
SAVI and DLPS learning models on mathematical problem solving Syazali, Muhamad; Afandi, Kiki; Ramadhani, Rahmi
Desimal: Jurnal Matematika Vol. 5 No. 1 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i1.12810

Abstract

Problem-solving ability is an skills related to mathematical characteristics which instructors need to encourage educators to be able to solve problems. This process certainly uses the right learning model to reach the target in accordance with the curriculum. This study aims to compare the influence of Somatic, Auditory, Visualization, and Intellectually (SAVI) and Double-loop Problem-solving (DLPS) methods in influencing mathematical problem solving skills. This study uses quantitative types with data analysis techniques using the T test. The results of this study are that there is an average value in the SAVI learning model of 77.7 while the average value of the DLPS learning model is 77.3. The conclusion can be drawn that the SAVI and DLPS learning models have the same effect on problem solving skills. 
Mathematical problem-solving ability: The impact of self-regulated learning on the system of linear inequalities in two variables Amalia, Hilda; Jusra, Hella
Desimal: Jurnal Matematika Vol. 5 No. 2 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i2.12893

Abstract

This research aims to analyze the mathematical problem-solving ability of students in terms of self-regulated learning. The method used in this research is the qualitative descriptive method. There are 4 indicators of problem-solving ability in this research, namely understanding the problem, formulating the problem, solving the problem, and re-examining the answers. The four indicators of problem-solving ability can be met by subjects who have a high self-regulated learning category. Subjects with medium self-regulated learning category were only able to fulfill 3 indicators of problem-solving ability. Meanwhile, subjects with low self-regulated learning were only able to fulfill 2 indicators of problem-solving ability. The results showed that the ability to solve problems with high categories was owned by subjects with high self-regulated learning.
Improving mathematic communication ability through islamic math e-comic media: A study on building flat sides Suri, Fraulein Intan; Anggoro, Bambang Sri; Komarudin, Komarudin; Fahmi, Rohmah Romadhona
Desimal: Jurnal Matematika Vol. 5 No. 2 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i2.12910

Abstract

Media Islamic Math e-Comic is a mathematical comic with Islamic nuances that has mathematical problem solving with clear illustrations and problem-solving methods according to indicators that can improve students' mathematical communication skills. This study aims to determine how much the increase in mathematical communication skills in the use of Islamic Math e-Comic media on the subject of flat side space for class VIII. The media is developed through stages in the ADDIE model (Analysis, Design, Development, Implementation, and Evaluation). This type of research is Quasy Experiment by giving pretest and posttest questions on small-scale tests and large-scale tests. Then, the effectiveness test of the use of Islamic Math e-Comic media was carried out using the Effect Size test, obtaining results of 0.53 with the "medium" criteria. This shows an increase in the value obtained by students after using the Islamic Math e-Comic media on the flat side space building material.
Structural model equations: Analysis on the performance abilities of the main competencies of graduates Sunanto, Rahma Faelasofi; Hendrowati, Tri Yuni
Desimal: Jurnal Matematika Vol. 5 No. 3 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i3.12974

Abstract

The purpose of this research is to find out the structural equation model (Structural Equation Model) on the perceptions of users of the graduates of the Teaching and Education Faculty (FKIP) Muhammadiyah Pringsewu University on the performance abilities of graduates' main competencies and the ability to work in teams. This research will use the Partial Least Square (PLS) method which can be used for small samples. In addition, PLS does not require the assumption that the data distribution must be normal or not. The results of this research are ethics, developing English language skills, and self-development has a positive effect on the ability to work in teams and performance skills related to the main competencies of graduates. Also, there is a positive influence from the ability to work on the main competencies, whereby increasing the ability to work will increase the main competencies of FKIP UMPRI graduates.
Application of intuitionistic fuzzy sets in determining the major in senior high school Oktaviani, Dinni Rahma; Habiburrohman, Muhammad; Amalina, Ijtihadi Kamilia
Desimal: Jurnal Matematika Vol. 5 No. 3 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i3.13018

Abstract

Intuitionistic Fuzzy Set (IFS) is useful to construct a model with elaborate uncertainty and ambiguity involved in decision-making. In this paper, the concept relation and operation of intuitionistic fuzzy set and the application in major of senior high school determination using the normalized Euclidean distance method will be reviewed. Some theorem of relation and operation of intuitionistic fuzzy set are proved. In general, to prove the theorem the definition and some basic relation and operation laws of IFS are needed. The distance measure between IFS indicates the difference in grade between the information carried by IFS. There are science, social, and language majors in senior high school. The normalized Euclidean distance method is used to measure the distance between each student and each major. The major, which each student can choose, has been determined depending on test evaluations. The solution provided is the smallest distance between each student and each major using the normalized Euclidean distance method.
Mathematical problem-solving: The impact of personality type on the system of linear equations in two variables Tiana, Hisna; Purwanto, Sigid Edy
Desimal: Jurnal Matematika Vol. 5 No. 2 (2022): Desimal: Jurnal Matematika
Publisher : Universitas Islam Negeri Raden Intan Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24042/djm.v5i2.13050

Abstract

This research aims to justify students' mathematical problem-solving abilities on the material of the System of Linear Equations in Two Variables in terms of the Hippocrates-Galenus personality type. This research method is included in qualitative descriptive research. The technique used is purposive sampling. The instruments in this research were personality-type questionnaires, mathematical problem-solving ability tests, and interviews. The triangulation technique was obtained by comparing the results of the student's problem-solving ability tests on the material of the System of Linear Equations in Two Variables with the results of the interviews. The results of this research are that the sanguine did not fulfill the aspect of re-examining all the stages that have been carried out, the choleric did not meet the problem-identifying aspect, the melancholy fulfilled the four aspects of mathematical problem-solving, and the phlegmatic did not meet two aspects, namely solving the problem according to the plan and re-examining all the stages that have been completed. Each student with each personality type according to Hippocrates-Galenus has different thoughts and steps to solve mathematical problems, therefore both educators and students who have different mindsets are expected to understand different thoughts.

Page 17 of 33 | Total Record : 330

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