Practical exercises in mental arithmetic
By: By George A. Mirick, Frank W. Ballou, and Lida Lee Tall
Contributors: Ballou, Frank W.; Tall, Lida Lee, 1873-1942
Publisher: Ginn and Co.
Published: 1920
Place of publication: Boston; New York [etc.]
Language: eng
Number of pages: 115
Subjects: Mental arithmetic