Página web de la actividad: http://activities.sugarlabs.org/addon/4293 Sugar Platform: 0.82 - 0.88 Descargar ahora: http://activities.sugarlabs.org/downloads/file/26963/abacus-16.xo Notas de la versión: * added colored beads to decimal abacus and rods Sugar Labs Activities http://activities.sugarlabs.org