There are infinitely many answers. 1 times 81, for example.
81 times.
1.62 times.
How about: 9 times 9 = 81 or 81 times 1 = 81
1, 10, 11, 12, 13, 14, 15, 16, 17, 18,19, 21, 31, 41, 51, 61, 71, 81, 91, 100 = 21 times
1 goes into 81 81 times.
There are infinitely many answers. 1 times 81, for example.
81 ÷ 27 = 3.
81 ÷ 9 = 9
Two goes into eighty-one 40.5 times.
1 x 81, 3 x 27, 9 x 9, 27 x 3, 81 x 1 = 81
432 times
81 times.
1.62 times.
How about: 9 times 9 = 81 or 81 times 1 = 81
1, 10, 11, 12, 13, 14, 15, 16, 17, 18,19, 21, 31, 41, 51, 61, 71, 81, 91, 100 = 21 times
81 ÷ 28 = 2 with remainder 25.