5-minute math problem of the day /  
by Martin Lee and Marcia Miller.   
 - New York :  Scholastic Professional Books,   c2000.   
 - 63 p. : ill.   
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>CIR 793.74 L514 2000