Holt mathematics 

 - 422p.; 25cm. 
<br/><br/> Includes a lesson on computers and extra practice activities. 
<br/><br/>Includesglossary and index. 
<br/><br/><label>ISSN: </label>a 
<br/><br/><label>Dewey Class. No.: </label>510 H7422 1985