Alferez, Merle S. <br/><br/>
Addition techniques / 
Merle S. Alferez, Manuel P. Cuison, Jr. Guillermo S. Supangan III, authors ; Gerard S. Alferez. 
 - Quezon City :  MSA Academic Advancement Institute,  2008. 
 - 139 p. : ill. 
 - MSA mental math tricks .
<br/><br/><label>ISBN: </label>9718740899 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Addition<br/>Mathematical recreations