Dela Cruz, Lourdes P., <br/><br/>
Simplifying mathematical challenges grade 4/ 
Lourdes P. Dela Cruz, Celedonia R. Hermano. 
 - Marikina City:  InstructionalCoverage System Publishing, Inc.,  2012. 
 - 533 pages:  illustrations, tables, figures;  28 cm. 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>9717193946 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Simplification in Mathematics.
<br/><br/><label>Dewey Class. No.: </label>510  / L86