共 50 条
- [3] CHILDRENS ACQUISITION OF SUBTRACTION ALGORITHMS BULLETIN OF THE BRITISH PSYCHOLOGICAL SOCIETY, 1985, 38 (FEB): : A13 - A13
- [4] CHILDRENS UNDERSTANDING OF ADDITION AND SUBTRACTION PROCEEDINGS OF THE EIGHTH ANNUAL MEETING - PME-NA: NORTH AMERICAN CHAPTER OF THE INTERNATIONAL GROUP FOR THE PSYCHOLOGY OF MATHEMATICS EDUCATION, 1986, : 42 - 47
- [6] CHILDRENS THINKING IN ARITHMETIC BULLETIN OF THE BRITISH PSYCHOLOGICAL SOCIETY, 1958, (35): : A12 - A12