Subtraction 

 - [30] pages ;  21 cm 
<br/><br/> Primary 
<br/><br/><label>ISBN: </label>8187288299 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Subtraction<br/>Arithmetic
<br/><br/><label>Dewey Class. No.: </label>513.212