Learning mental maths 2 
Har - ananad 
 - 1st ed 
 - New Delhi  Har- Anand Publications pvt Ltd  2007 
 - 80 p. : col. ill 
<br/><br/><label>ISBN: </label>9788124112311 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510 LEA