 = 0.0000000000 0.0000000000000000   + 0.00000000000000000  = 0.00000000000 0.00000000000000000  + 0.00000000000000000  = 0.0000000000 0.00000000000000000  + 0.00000000000000000  = 0.0000000000 0.0000000000000000   + 0.00000000000000000  = 0.00000000000                                             