Lacsamana-Jensen, Paz A. Speed math : multiplication and addition / Paz A. Lacsamana-Jensen - Pasig City, Philippines Anvil Publishing, Inc. c2005. - 85 p. ISBN: 971-27-1536-1 Subjects--Topical Terms: Mathematics--Study and teaching (Secondary). Dewey Class. No.: Cir 510 L1198 2005