AN ANALYSIS OF MATHEMATICAL’S WRITING OF STUDENT’S ABILITY ON THE CLASS VIII

Abstrct The research has a goal to describe writing mathematical student capability based on mathematics expression aspect and writing text aspect on the system equation linear two variable lesson.The research is using qualitative approach which creature of descriptive. The collecting technique of data which done is about the result of answering test. The result’s analysis of the research student capability on writing mathematical expression and writing text which be on the system equation linear two variable matter is about the student can writing mathematics model which suitable with the matter has given, but did not write the formula completely. The result’s analysis of test on the writing text aspect, student can write the symbol exactly but there is notconsistently and less coherent on writing steps. A shortage of mathematics expression and writing text because of student less on understanding what it asked on the matter. The abilities’ result of students mathematics written based on expression mathematics on the high cathegories and get average about 67,54%, while getting result of writing text on the middle cathegories as about 60,52%.


INTRODUCTION
Education have an act interesting on the human life.National education have a function to develop ability and make an characteristic with nation culture which have a grade on the framework to make human life clever.The effort which do for make an human life clever, the government must do action such as curriculum development to learning in the school.One of the goal of mathematics learning which want to achieve is giving the opportunity as possible to student to develop communication skill by modeling or showing, speaking a word, writing, discussing, describing and presenting what is learned (Wahyuni, 2015).
Communication is a process of information delivery which a message, an idea, or concept of a sides to other sides may be affect each other both (Widiastuti, 2011).activities, where student can explain mathematics idea each other (Fajar, 2014).One of the aspect on the mathematical communication activities is writing.Writing activities is really important aspect on the mathematical communication.According to Fajar (2014) mathematical's writing describe mathematics idea and thinking process on the mathematics problem solving by following the principles writing in mathematics.Student said to be able to write mathematical, if student write the solution to a problem or task which given by regard a symbol or formula: organizes all the work step by step: and solve the problem use graphics, picture or table (Supandi, 2013).

Mathematical communication is an interaction process in the mathematics learning
Mathematical's writing have function to explain of mathematics idea which student have.The observation's result found a problem, such as student communication by learning mathematics.The observation which done on the VIII A class there are 12 student who did not consistent in writing symbol, did not writing a formula systematicly and write a step solution did not complete, so that the result is inaccurate.Because of that mathematical writing ability could be describe as a problem faced by student.According to Rias (2013) about the communication mathematical student ability to the matter of a beam and cube which explaining the average of writing text capabilities at about 66.756%.The writing ability be on category of capable, because part of student able to explain a problem with a figure form and situation.Student can explain a problem, but the explaining which given incomplete and systematically structure.Student can also understand of the problem, but they were difficulty to arrange a sentences.The average's result of mathematical expression student ability to the matter of a beam and cube at about 46.525%.theresult give information that mathematical expression student be on intermediate classified, because part of student less capable to modeling a problem so that cannot do a counting.

THE RESEARCH METHOD
The kind of the research is descriptive using the qualitative approach.The data which got on the research is data about answer's result and student's test.indicator can produce percentage 67,54%, so mathematics expression student ability be on high category.

Mathematical writing ability on the writing text aspect
The indicator of writing text on the research include mathematics writing symbol correctly and writing a step of solving a mathematics problem.The ability to using a symbol correctly to writing mathematics answer is so needed.Writing a step to solve a problem is the result of student's understanding for the lesson that has been learned.
Step has relation with a completely and systematical when solve a problem and give a reason with a steps has written.
Vol. 1 No. 2 August 2017 P-ISSN : 2579-5724 E-ISSN : 2579-5260 http://ejournal.umm.ac.id/index.php/MEJ The research conducted in MTs Muhammadiyah 1 of Malang on the date of 1 st until 2 nd March 2017.The research subject is all of student in VIII A class on MTs Muhammadiyah 1 of Malang with a total of 19 student.The research procedurdevide on three step, they are preparing step, planning step, and implementation step.Vol. 1 No. 2 August 2017 P-ISSN : 2579-5724 E-ISSN : 2579-5260 http://ejournal.umm.ac.id/index.php/MEJThedata collecting technique which used on the research is using test.Test on the research is using to measure a mathematical writing student ability on the mathematics expression aspect and writing text aspect.The data which collecting on the research is the answering student result about system of linear equation of two variable.The data which resulted in the research is about describe an answering student result, so that the research use writen test technique to collect a data.THE RESULT OF THE RESEARCH AND THE DISCUSSIONThe research was conducted in VIII A class of MTs Muhammadiyah 1 of Malang during 2 meeting times on the date 1 st until 2 nd March 2017.The result of the research talking about mathematicals writing of student's ability on the matter of a system of equation linear two variable with using two aspect, they are mathematics expression aspect and writing text aspect.mathematics expression aspect is the representation of student ability to understand the problem, meanwhile writing text aspect on the research include writing mathematics symbol correctly and writing the step to solve the mathematics problem.1.Mathematical writing ability on the mathematics expression aspectMathematics expression is the representation of student ability to understand the problem which do on the research with two indicators, they are mathematics model and writing mathematics formula.Student can make mathematics expression if student can write a formula and mathematics model.

Table 1
Mathematical of Writing Ability on The Mathematics Expression Aspect /ejournal.umm.ac.id/index.php/MEJ31% with the high category.Comprehensively on the first indicators produce percentage 74,56%, it is describe that student ability on the high category to indicators of writing a problem on the form of mathematics model correctly, logical, systematic.The second indicator, on the number one produce percentage of 65,79% with the intermediate category, number two produce percentage of 44,74% with the intermediate category, meanwhile on the number three produce percentage of 71,05% with the high category.Comprehensively on the second indicator produce percentage of 60,53%, it show that student ability on the intermediate category to indicator of writing mathematics formula correctly.The result of mathematical mathematics student ability to mathematics expression aspect on the first and second Vol. 1 No. 2 August 2017 P-ISSN : 2579-5724 E-ISSN : 2579-5260 http://ejournal.umm.ac.id/index.php/MEJ

Table 2
Mathematical of Writing Ability on The Writing Text Aspect 84% with a middle category.Comprehensively on the first indicator produce percentage 57,45%, it shows that student ability on the middle category to indicator of mathematics symbol correctly.The second indicator, on the number one produce percentage 65,79% with the intermediate category, number two produce percentage 51,31% with the middle category, meanwhile on the number three produce percentage 73,68% with the high category.Comprehensively on the second indicator produce percentage 63,59%, it shows that student ability on the intermediate category to indicator of writing step to solve a problem completely.The test's result of mathematical writing student ability on the aspect writing text on the first and second indicator produce percentage of 60,52%, so writing text student ability be on middle category.