Learning mental maths 
Har-anand publications 
 - New Delhi  Har- Anand Publications pvt Ltd  2010 
 - 80 p. : (col).ill., bpk 
<br/><br/><label>ISBN: </label>9788124112328 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510 LEA