Subtraction drill for levels 1-3

書目詳細資料
主要作者:	Mock, Valerie E.
格式:	圖書
語言:	English
出版:	Belmont, Calif. David S. Lake Publishers c1982.
叢編:	A learning workbooks : Mathematics [v.3]
主題:	Subtraction > Study and teaching (Primary) Subtraction > Problems, exercises, etc.