Lacsamana-Jensen, Paz A. <br/><br/>
Speed math : subtraction and division 

 - Pasig City    Anvil Pub.  2006 
 - xii, 168 p. 
<br/><br/><label>ISBN: </label>978-971-27-1788-8 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics - study and teaching
<br/><br/><label>Dewey Class. No.: </label>Fil 510 L11s