• Hospice
• /
• s.15
• /
• pp.17-19
• /
• 1999

• Environmental engineer
• /
• s.63
• /
• pp.18-19
• /
• 1991

• Journal of Educational Research in Mathematics
• /
• v.24 no.3
• /
• pp.467-480
• /
• 2014

Concepts related to the fraction should be taught with formative thinking activities as well as concrete operational activities. Teaching improper fraction should follow the concept of fraction as a relation of two natural numbers. This concept is also important not to be skipped before teaching the fraction such as "4 is a third of 12". Mixed number should be taught as a sum of a natural number and a proper fraction. Fraction as a quotient of a division is a hard concept to be taught since it requires very high abstractive thinking process. Learning the transformation of division into multiplication of fractions should precede that of fraction as a quotient of a division.

• Monthly Newsletter
• /
• no.64
• /
• pp.1-4
• /
• 1993

신수산 행정지표 설정 - 신수산행정 어항계서 할 몫 - 어항계획수립의요령[46]

• The Monthly Diabetes
• /
• s.69
• /
• pp.22-25
• /
• 1995

• TTA Journal
• /
• s.77
• /
• pp.101-106
• /
• 2001

• 방재와보험
• /
• s.129
• /
• pp.64-65
• /
• 2009

이번 탐방은 국내 유일의 소구경 탄약 제조공장으로, 우리나라 자주국방의 모태로 운영되고 아울러 외화획득에도 한 몫을 하고 있는 (주)풍산 동래공장을 방문하였다.

• The Science & Technology
• /
• v.34 no.7 s.386
• /
• pp.78-80
• /
• 2001

• The Science & Technology
• /
• v.34 no.6 s.385
• /
• pp.26-27
• /
• 2001

• Life and Agrochemicals
• /
• v.26 no.3 s.206
• /
• pp.22-24
• /
• 2005