Teaching Decimal Operations to Develop Mathematical Thinking and Reasoning Competency for Primary School Students in Vietnam

Vietnam is in the process of comprehensively reforming education. In 2018, the Vietnamese Ministry of Education and Training issued the General Education Program. In addition to general competencies, the 2018 General Education Program also aims to develop specific competencies for students, including mathematical competency. Mathematical competency includes 5 component competencies: mathematical thinking and reasoning; mathematical modeling competency; mathematical problem solving competency; mathematical communication competency; competency in using mathematical tools and means. This article presents some measures to develop mathematical thinking and reasoning competency for 5th grade students through teaching the content of calculations with decimals in primary school. These are also some suggestions for managers and teachers of primary schools in Vietnam to improve the quality of teaching Mathematics in general.