COMPUTATIONAL TECHNIQUES OF ELEMENTARY-AGED CHILDREN IN STREET VENDING A Research Presented to The Faculty of Science, Technology and Mathematics College of Teacher Development Philippine Normal University In Partial Fulfilment of the Requirements for the Undergraduate Program In Bachelor of Science in Mathematics for Teachers JOSEPHINE R. CANO JOANA GABRIELLA N. CORVERA JEA AIREEN CHARIMAE M. DE MESA MERRY GRACE D. DELA CRUZ PRINCESS R. PULI October 2015