Merttens, Ruth,  <br/><br/>
Investigating numbers and shape 

 - 31 pages :   colour illustrations ;   28 cm 
<br/><br/><label>ISBN: </label>185270022X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Aritmetics - Problems, exercises, etc.
<br/><br/><label>Dewey Class. No.: </label>513.2