An experimental study to determine the relative difficulty of the elementary number combinations in addition and multiplication

An experimental study to determine the relative difficulty of the elementary number combinations in addition and multiplication

Format:
Book
Responsibility:
by Harry Vance Holloway
Language:
English
Description:
102 p., [4] folded leaves; 23 cm
Publication info:
Trenton, N.J., United States. 1915. State Gazette Pub. Co.
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