Subtraction. 

 - Quezon City :  Mabuhay Educational Center,  2002. 
 -  50 flash cards: colored; 13.5 x 10 cm. 
<br/><br/><br/>English 
<br/><br/><label>ISBN: </label>Flash card 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Subtraction
<br/><br/><label>LC Class. No.: </label>513.212 Su16 c2002