Clark, William D.  <br/><br/>
Easy math step-by-step:  master high-frequency concepts and skills for mathematical proficiency-fast / 
William D. Clark and Sandra Luna McCune 
 - 2nd ed. 
 - New York:  McGraw-Hill Education,  c2019. 
 - vii, 294p.;  ill. 
<br/><br/> Includes index  
<br/><br/><label>ISBN: </label>978-1-260-13521-3 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>510 C549 2019