Tank, Bonnie <br/><br/>
Teaching Arithmetic Lessons for Addition and Subtraction :  Grades 2-3. 

 - Sausalito, CA :  Math Solutions Publications,  2001. 
<br/><br/><label>ISBN: </label>0-941355-32-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Addition--Study and Teaching (Primary)<br/>Subtraction--Study and teaching (Primary)