KESALAHAN REPRESENTASI PECAHAN PADA GARIS BILANGAN

Tatik Retno Murniasih(1*), Cholis Sadijah(2), Makbul Muksar(3), Susiswo Susiswo(4), Vivi Suwanti(5),

(1) Universitas Kanjuruhan
(2) Universitas Negeri Malang
(3) Universitas Negeri Malang
(4) Universitas Negeri Malang
(5) Universitas Kanjuruhan
(*) Corresponding Author


Abstract


Penelitian tentang analisis kesalahan representasi pecahan calon guru matematika penting karena pecahan berguna dalam kehidupan sehari-hari. Tujuan penelitian untuk menyelidiki kesalahan calon guru matematika dalam representasi tugas kepekaan pecahan pada garis bilangan. Tipe kesalahan dan indikator menunjukkan keterampilan representasi pecahan. Penelitian ini menggunakan pendekatan deskriptif kualitatif dengan 19 calon guru matematika sebagai calon subjek. Wawancara dilakukan pada 5 subjek yang dipilih. Pada wawancara, kami meminta mereka untuk mendeskripsikan jawaban mereka dalam merepresentasikan tugas kepekaan pecahan pada garis bilangan dan faktor-faktor yang menyebabkan kesalahan. Hasil penelitian menunjukkan dua kesalahan terbesar pada calon guru matematika, yaitu tidak terampil menggunakan estimasi, dan tidak terampil menggunakan benchmark. Temuan lain menunjukkan lebih banyak calon guru matematika yang melakukan kesalahan dalam representasi pecahan negatif daripada pecahan positif pada garis bilangan. Hal ini disebabkan adanya hambatan kognitif calon guru matematika dari pengetahuan sebelumnya dalam domain pecahan positif  ketika  diterapkan pada domain pecahan negatif. Sehingga lebih banyak calon guru matematika yang melakukan kesalahan dalam representasi pecahan negatif daripada pecahan positif pada garis bilangan. Faktor-faktor penyebabkan kesalahan representasi dari penugasan kepekaan pecahan pada garis bilangan adalah calon guru menganggap materi pecahan sulit, sulit membayangkan pecahan, mengalami kebingungan dan lupa dengan materi pecahan. Intervensi berbantuan media direkomendasikan untuk mengatasi ketidakmampuan calon guru menggunakan estimasi dan bencmark terutama dalam domain pecahan negatif.


Keywords


Error representation; fraction sense; number line.

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DOI: http://dx.doi.org/10.24127/ajpm.v9i2.2740

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