Introducing addition and subtraction symbols to first graders
Publisher: Gainesville, FL
Published: 1987
Language: eng
Number of pages: 155
Subjects: Mathematical notation--Study and teaching; Arithmetic--Study and teaching.
Description: <a href="http://uf.catalog.fcla.edu/uf.jsp?st=UF000940984&ix=pm&I=0&V=D&pm=1" rel="nofollow">http://uf.catalog.fcla.edu/uf.jsp?st=UF000940984&ix=pm&I=0&V=D&pm=1</a>