Straker, Anita <br/><br/>
Mental maths 4 
Anita Straker 
 - Cambridge  Cambridge University Press  2009 
 - 31 p. : col. ill 
<br/><br/><label>ISBN: </label>9780521485548 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>372.7 STR