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), 62–70. https://doi.org/10.36057/jips.v1i2.248