Simple maths. 

 - [S.l.] :  St. Martin`s Press,  2009. 
 - [ ] p. : col. ill.:  27 cm. 
 - Let`s get ready for school wipe clean age 4 + .
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>978-1-84332-939-8 
<br/><br/><label>LC Class. No.: </label>510 M42 c2003