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All Journal Edumatsains Brillo Journal Jurnal Pengabdian Sains dan Humaniora

Santri Chintia Purba

Universitas Kristen Indonesia

Author-ID : 5338952

Agriculture, Biological Sciences & Forestry Chemistry Education Mathematics Physics Other

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Perbedaan Kemampuan Matematis Siswa pada Pembelajaran Berbasis Online dengan Model Problem-Based dan Ekspositori Clara Natalia; Risma Uly Manalu; Santri Chintia Purba
Brillo Journal Vol 1 No 1 (2021): Implementasi Model Pembelajaran terhadap Kemampuan Matematis Siswa
Publisher : S&Co Publishing

This study aims to: 1) Determine the significant differences in students’ mathematical abilities using the Problem-Based Learning (PBL) and Expository learning model with Online-based learning; 2) Knowing the difference in the significant increase in students' mathematical abilities using the PBL and Expository learning model with online-based learning. The research method used is a Quasi Experiment with Nonequivalent Control Group Design. The research subjects were students of class XI MIA which consisted of 33 students in the experimental class and 35 students in the control class. The results showed that all stages of learning were in accordance with the stages of the PBL and Expository learning model. Based on statistical calculations (t-test ') with a significance level of 0.05, it was found that there was no significant difference and increase in the mathematical abilities of students who were taught the PBL and Expository learning model with Online-based learning.

Analisis Kemampuan Pemecahan Masalah Siswa SMP pada Materi Statistika Ditinjau dari Kemampuan Awal Matematika Mega Rosalinda; Santri Chintia Purba; Risma Uli Manalu
Brillo Journal Vol 1 No 2 (2022): Profil Kemampuan Pemecahan Masalah Matematis Siswa
Publisher : S&Co Publishing

The topic is carried out on the basis of analyzing the math problem solving ability of secondary school students on the basis of statistical documents considered from the initial math problem solving ability. The purpose of this study is to find a method to analyze the math-solving ability of middle school students on the basis of statistical data on the initial math-solving ability. The method used in this study is qualitative method. This study was conducted at Santa Maria Monica High School. Subject used in this study are 9th grade VIII SMP Santa Maria Monica students using rational sampling technique. The results of this study indicate that students with high initial math skills can perform all stages of problem solving correctly and accurately. Students with early average math abilit were able to solve the give problems, were able to take actions to solve the problem, but still the steps were no systematic and not maximal. Students with low initial math skills may not complete all step of the Problem Soving indicator corretly.

Profil Kemampuan Pemahaman Matematis Siswa SMK Swasta Otomindo Jakarta pada Materi Sistem Persamaan Linear Dua Variabel Cindi Sinaga; Bitman Manullang; Santri Chintia Purba
Brillo Journal Vol 1 No 2 (2022): Profil Kemampuan Pemecahan Masalah Matematis Siswa
Publisher : S&Co Publishing

Lesson plans are more focused on how to achieve goals and indicators. However, student ability profile has not become the main basic standard. Therefore, this research aims to describe the profile of students' mathematical understanding abilities. This research is a quantitative descriptive conducted on XI grade Otomindo’s vocational students in Jakarta. Data obtained from student achievement on the understanding ability test. Students' understanding is profiled according to the results of data analysis on their level and abilities based on achievement in mechanical, inductive, rational and intuitive indicators. The results of the study concluded that the profile of students' mathematical understanding abilities was dominated by inductive understanding abilities. It is because students are better able to apply formulas or concepts to simple or similar problems, but it is difficult to the rational and intuitive indicators. Students' mathematical understanding ability is included in the low category on two indicators, that is rational in terms of describing the truth of formulas and theorems, and intuitive in term of estimating the truth before analyzing further. While in the medium category, it is on mechanical indicators in terms of remembering and applying formulas routinely and calculating simply.

Analisis Kesalahan dalam Pemecahan Masalah Logaritma Kelas X MIPA SMA Harapan Jaya Cipto Hardiansyah; Bitman Manullang; Santri Chintia Purba
Brillo Journal Vol 1 No 2 (2022): Profil Kemampuan Pemecahan Masalah Matematis Siswa
Publisher : S&Co Publishing

This study aims to find out the various errors of students in working on logarithmic problems so that the specific objectives in this study are: (1) Knowing the types of errors made by students in solving logarithmic problems. (2) Knowing the factors that cause student errors in solving logarithmic problems. This research was conducted at Harapan Jaya High School. Based on this goal, the results of this study can be used by teachers to overcome the same problem in the future. The approach used in this study is a qualitative approach. The research method used is a case study. The samples used in this study were 3 students of class X MIPA SMA Harapan Jaya with purposive sampling technique. The results of this study indicate that: (1) There are 3 types of errors made by students, namely conceptual errors, procedural errors and arithmetical errors. (2) The factors that cause student errors are the condition of students being tired, learning conditions that are not supportive and not focused and not thorough. Based on the results of this study, teachers are expected to be able to assist students in minimizing existing errors by implementing various learning models that increase students' accuracy in solving various problems. In addition, teachers can also provide feedback to students so that students can find out their mistakes and help students overcome any errors that exist.

Co-Authors Bela Desy Natalia Bitman Manullang Candra Ditasona Cindi Sinaga Cipto Hardiansyah Clara Natalia Daniel Dongan Parulian Siagian Kerdid Simbolon Kornelius Anugrah Zebua Mega Rosalinda Risma Uli Manalu Risma Uly Manalu, Risma Uly Ruth Ririn Vania Siregar Stevi Natalia Tan Hian Nio Yohana Aplonia Pahanael

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