00365nam a2200121 4500 5418 5418 Fil. 513.213 M333 2004 Mariano, Ma. Luisa 12956 Mental math / Ma. Luisa Mariano. Quezon City : University of the Philippines Open University, c2004. 30 p. ; 15 cm. Mathematics Skills. 12957 BK 0 0 0 0 FIL HS-IMC HS-IMC FIL 2012-07-16 Purchased 2 Fil. 513.213 M333 2004 23203 2024-10-18 13:53:43 2024-10-18 2018-05-18 FIL 0 0 0 0 FIL HS-IMC HS-IMC FIL 2012-07-16 Purchased 1 Fil. 513.213 M333 2004 23204 2024-10-03 09:58:04 2024-09-30 2019-11-22 FIL