Harries, Tony. <br/><br/>
Mental mathematics for the numeracy hour / 
Tony Harries and Mike Spooner. 
 - London :  David Fulton,  2000. 
 - 122p :  ill. ;  25 cm. 
<br/><br/>Includes bibliography and index. 
<br/><br/><label>ISBN: </label>1853466441 9781853466441 
<br/><br/><label>Nat. Bib. No.: </label>GBA015836  bnb 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental arithmetic--Study and teaching (Elementary)--Great Britain.