De Leon, Erminda E., <br/><br/>
Simplifying mathematical challenges grade 5/ 
Erminda E. De Leon, Amelia F. Lopez. 
 - Marikina City:  InstructionalCoverage System Publishing, Inc.,  2012. 
 - 546 pages:  illustrations, tables, figures;  28 cm. 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>9717193953 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Simplification in Mathematics.
<br/><br/><label>Dewey Class. No.: </label>510  / L86