<![CDATA[ABSTRAKThis study was motivated by the low mathematics learning outcomes of students in the topic of two-digit multiplication. This condition was indicated by students' limited understanding of the concept of multiplication, resulting in low participation during the learning process. The purpose of this study was to determine the effect of using Problem Based Learning-based Student Worksheets (LKPD) on the mathematics learning outcomes of third-grade students at SDN 2 Mulyaguna. This study employed a quantitative approach using an experimental method involving an experimental class and a control class. The sampling technique used was total sampling, in which the entire population was selected as the research sample. Data were collected through a test, while data analysis was conducted using an independent samples t-test. The results showed that the mean posttest score of the experimental class was 81.77, whereas the mean score of the control class was 70.44. The independent samples t-test yielded a significance value of 0.000 (< 0.05), indicating that the null hypothesis (H₀) was rejected and the alternative hypothesis (Hₐ) was accepted. Therefore, it can be concluded that the use of Problem Based Learning-based Student Worksheets (LKPD) had a significant effect on the mathematics learning outcomes of third-grade students at SDN 2 Mulyaguna. Penelitian ini dilatarbelakangi oleh rendahnya hasil belajar matematika siswa pada materi perkalian dua bilangan. Hal tersebut terlihat dari rendahnya pemahaman siswa terhadap konsep perkalian dua bilangan, sehingga membuat siswa kurang aktif dalam proses pembelajaran. Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan LKPD berbasis Problem Based Learning terhadap hasil belajar matematika siswa kelas III SDN 2 Mulyaguna. Jenis penelitian ini adalah penelitian kuantitatif dengan metode eksperimen yang melibatkan kelas eksperimen dan kelas kontrol. Teknik pengambilan sampel menggunakan total sampling, sehingga seluruh populasi dijadikan sampel penelitian. Teknik pengumpulan data dilakukan melalui tes, sedangkan teknik analisis data menggunakan uji t independen (Independent Samples t-test). Berdasarkan hasil penelitian diperoleh nilai rata-rata posstest kelas eksperimen sebesar 81,77, sedangkan pada kelas kontrol sebesar 70,44. Hasil uji-t menunjukkan nilai signifikansi sebesar 0,000 < 0,05, sehingga H₀ ditolak dan Hₐ diterima. Dengan demikian, dapat disimpulkan bahwa penggunaan LKPD berbasis Problem Based Learning memberikan pengaruh yang signifikan terhadap hasil belajar matematika siswa kelas III SDN 2 Mulyaguna. ]]>
