Straker, Anita. <br/><br/>
Mental maths answers :  starter book and books 1 to 6 / 
by Anita Straker. 
 - 6th. ed. 
 - Cambridge :  Cambridge University Press,  c1996, 2003. 
 - 31 p. : ;  25 cm. 
<br/><br/><label>ISBN: </label>0521589290 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics.<br/>Mathematics--Study and teaching (Primary)