Straker, Anita. <br/><br/>
Mental maths 2 / 
by Anita Straker. 
 - 7th. ed. 
 - Cambridge :  Cambridge University Press,  2001. 
 - 31 p. : ;  25 cm. 
<br/><br/><label>ISBN: </label>0521485525 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics--Problems, exercises, etc.<br/>Mathematics--Study and teaching (Primary)