摘要：This study aimedto describestudents' critical thinking skills towards the conceptsdifferencesin finding the area of a plane region and definite integral.This study used an exploratory test survey method with test instruments.Data weretaken from 40 students of the mathematics department at a university in Central Java.The results showed that students' critical thinking skills towards the concepts differencesin finding the area of a plane region anddefinite integralwerein the medium category.The students' critical thinking skills towards the concepts differencesin finding area of a plane region and definite integral were medium (47.5%),with clarification by 57.5% (medium),assessment by 40.0% (medium),inference by 65.0% (medium),and strategies by 27.5% (low).These weaknesses are expected to be followed up by conducting learning that can show the linkages between the concepts and with variousways.
关键词：critical thinking skills;integral calculus;concept's difference;area of a plane region;definite integrals
