Developing number sense
By: by J. W. Calhoun ... Bureau of Public School Service, Division of Extension.
Contributors: University of Texas. Division of Extension. Bureau of Public School Service.
Series: University of Texas publication;; no. 4526, July 8, 1945
Publisher: The University
Published: 1945
Place of publication: Austin, Tex
Language: eng
Number of pages: 39
Subjects: Arithmetic -- Study and teaching.; Mental arithmetic.