The learning of the 100 addition combinations and the 100 subtraction combinations
By: by Frederic B. Knight and Minnie S. Behrens.
Contributors: Behrens, Minnie S., joint author.
Series: Longmans' monographs in education
Publisher: Longmans, Green and Co.
Published: 1928
Place of publication: New York; London [etc.]
Language: eng
Number of pages: 82
Subjects: Arithmetic -- Study and teaching; Educational psychology
Notes: "First edition".