LEFFINGWELL, Richard <br/><br/>
SImple Maths Doubling  and Multiplying 

 - 1st 
 - Great Britain  Raintree  2006 
 - 24 
<br/><br/><label>ISBN: </label> 150 
<br/><br/><label>Dewey Class. No.: </label>513.2'13/LEF