“Improving Student Achievement In Creative Integer Addition And Reduction Method Through Demonstrations With Equipment P Eraga Pinus Cards Fourth Grade Students Of Sdn 35 Parak Karakah East Padang District School Year 2015/2016” (2018) Jurnal Ilmiah Pendidikan Scholastic, 1(2), pp. 62–70. doi:10.36057/jips.v1i2.248.