00518nam a22001817a 4500 OSt 20140508134119.0 140508b xxu||||| |||| 00| 0 eng d 9789718740880 QA 135.6 .Al385 2008 Alfarez, Merle S. Mental math tricks : Multiplication techniques / Merle S. Alfarez. Quezon City : MSA Publishing House, 2008. 152 p. : ill. ; 23 cm. Mathematics. lcc BK 115865 115865 0 0 lcc 0 LUX LUX TR 2014-05-08 TR 1 QA 135.6 .Al385 2008 19682 2017-10-12 00:00:00 2017-10-11 1 2014-05-08 BK