Jensen, Lacsamana Paz <br/><br/>
Speed Math :  Subtraction & Addition 
Paz Lacsamana Jensen 
 - Philippines  ANVIL PUBLISHING, INC.  c2004. 
 - xii, 167 pages:  illustrations  22cm. 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>9789712717888 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Math
<br/><br/><label>Dewey Class. No.: </label>Res.(Fil.) 510 J54s 2004