3 x 1 1 81 July 8, 2019 16 32 64 128 1 3 x 1 81x 1 3 х 1 81 1 3 x 7 1 81 3 3x 1 1 81 3 x 2 4x 1 1 81 3 x 1 81 as a fraction 3 x 1 81 practice problems 81+ x 11