摘要:The purpose of this study was to: (1) analyze the effect of Batak-Angkola culture integration on Open-ended approach (BAC-OE) towards mathematical creative thinking skills (MCTS) of the students, (2) analyze the effect of initial mathematical abilities (IMA) on mathematical creative thinking skills, (3) find out whether there is an interaction between BAC-OE and IMA towards MCTS. The instrument used is the test of MCTS. Data analysis was carried out by two-way ANOVA. The results of the research show: (1) there is an effect of BAC-OE towards MCTS of the students, (2) there is an effect of IMA on MCTS of the students, (3) no interaction between BAC-OE and IMA towards MCTS.