Subject
History and Philosophy of Science,Physics and Astronomy (miscellaneous),Engineering (miscellaneous),Education,Mathematics (miscellaneous)
Reference3 articles.
1. Subtraction: What do students know;Carpenter;Arithmetic Teacher,1975
2. Systematic errors in the four vertical algorithms in normal and handicapped populations;Cox;Journal for Research in Mathematics Education,1975
3. Mitchell , Charles E. Children's performance on selected addition and subtraction situations involving the existence and non-existence of whole number solutions: A report of initial piloting. April 1979