Ashlock, Robert B.,  1930-, <br/><br/>
Error patterns in computation :  using error patterns to help each student learn /  [print] 
Robert B. Ashlock. 
 - tenth edition. 
 - Boston :  Allyn and Bacon,  (c)2010. 
 - xiii, 274 pages :  illustrations ;  23 cm. 
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<br/><br/><label>ISBN: </label>9780135009109 
<br/><br/><label>LCCN: </label>2008045371 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic--Study and teaching (Elementary)
<br/><br/><label>LC Class. No.: </label>QA135 QA135.A826.E776 2010