The purpose of the current research was to investigate the relation of cognitive precedent variables (counting capability. visualizing. hearing perception and metacognitive knowledge) with mathematical competence in preschool children in city of Isfahan. Statistical population of the study was 199 children (ages between 5 and 6 years) who were randomly selected. https://www.bekindtopets.com/limited-stock-Original-U-S-Vietnam-War-Era-Operation-Igloo-White-Seismic-Sensor-Inert-Rocket-great-price/