Catalyzes the hydrolysis of phosphoanhydride bonds of nucleoside tri- and di-phosphates. a ribonucleoside 5'-triphosphate + 2 H2O = a ribonucleoside 5'-phosphate + 2 H(+) + 2 phosphate Expressed both in the primary root and lateral root but not in the rosette leaves. No visible phenotype. Belongs to the GDA1/CD39 NTPase family.