An ordered pair approach to addition of rational numbers in second grade

✍ Scribed by FRANCIS HOWARD HILDEBRAND and NELLIE JOHNSON

• Book ID: 124200616
• Publisher: National Council of Teachers of Mathematics
• Year: 1965
• Weight: 400 KB
• Volume: 12
• Category: Article
• ISSN: 0004-136X
• DOI: 10.2307/41185100