Activity Homepage: http://activities.sugarlabs.org/addon/4293 Sugar Platform: 0.82 - 0.88 Download Now: http://activities.sugarlabs.org/downloads/file/26961/abacus-15.xo Release notes: * added Caacupe abacus (add and subtract fractions) * added Cuisenaire-Rods-like Abacus Sugar Labs Activities http://activities.sugarlabs.org