Mental math tricks :
Alfarez, Merle S.
Mental math tricks : on problem solving techniques / Merle S. Alfarez. - Quezon City : MSA Publishing House, 2014. - 160 p. : ill. ; 23 cm.
9789718740897
Mathematics.
QA 135.6 / .Al385 2014
Mental math tricks : on problem solving techniques / Merle S. Alfarez. - Quezon City : MSA Publishing House, 2014. - 160 p. : ill. ; 23 cm.
9789718740897
Mathematics.
QA 135.6 / .Al385 2014