1 3 х 1 81 July 8, 2019 16 32 64 128 1 3 x 1 81 1 3 х 7 1 81 1 3 1 81 1 3 x 81 8 1 3 x 2 1 81 1 3 mũ x 1 81 3 x 1 81 as a fraction 3 x 1 81 practice problems