Free Learn Addition contains eight lessons on basic addition and you learn them on board the Orbital One space station. To ensure you have grasped the subject 27 tests have been included. Free Learn Addition is the addition topic of
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View polyhedra. Hundreds provided (Platonic, Archimedean, Kepler-Poinsot & all other uniform polyhedra, Johnson Solids, Stewart toroids, compounds, geodesics etc). Rotate..
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If you experience problems getting this program read the 
View polyhedra. Hundreds provided (Platonic, Archimedean, Kepler-Poinsot & all other uniform polyhedra, Johnson Solids, Stewart toroids, compounds, geodesics etc). Rotate..
