Subtraction drill for levels 1-3

书目详细资料
主要作者:	Mock, Valerie E.
格式:	图书
语言:	English
出版:	Belmont, Calif. David S. Lake Publishers c1982.
丛编:	A learning workbooks : Mathematics [v.3]
主题:	Subtraction > Study and teaching (Primary) Subtraction > Problems, exercises, etc.