Mathematical reasoning/ 
HARCOURT ACHIEVE 
 - Austin, Texas :   Harcourt Achieve,   c2006. 
 - iii, 46 p. :   illustations ;   28 cm. 
<br/><br/><label>ISBN: </label>1-41-900375-5 
<br/><br/><label>Subjects--Topical Terms: </label><br/>1. Mathematics.
<br/><br/><label>Dewey Class. No.: </label>Circ. 510 H257 2006