Richardson, Judy,  1954- <br/><br/>
Mental maths in minutes :  for ages 5-7 / 
by Judy Richardson. 
 - reprinted. 
 - London :  A & C Black Publishers,  2007. 
 - 40 p. :  ill ;  30 cm. 
<br/><br/><label>ISBN: </label>9780713669305 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mental arithmetic--Examinations, questions, etc.