Ward, Ian. <br/><br/>
The magic of the matrix :  making arithmetic practice fun / 
by Ian Ward. 
 - Hatfield Road, St. Albans :  Tarquin Publications,  2007. 
 - 44 p. :  ill ;  28 cm. 
<br/><br/><label>ISBN: </label>9781899618774 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Arithmetic.<br/>Mathematics--Arithmetic.