A Study on the Teaching "Approximate Value" in Secondary School: Focused on the Comparison of Mathematics Textbooks of South and North Korea (중학교 근사값 단원 학습 지도 방향 탐색: 남북한 교과서 비교를 중심으로)
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- Journal of Educational Research in Mathematics
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- v.13 no.1
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- pp.77-94
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- 2003