Sirnayetti, S. 2018. 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. Jurnal Ilmiah Pendidikan Scholastic. 1, 2 (Oct. 2018), 62–70. DOI:https://doi.org/10.36057/jips.v1i2.248.