eighty-one times one and nine times nine
1 times 81 and 9 times 9 (assuming you meant only whole numbers)
They are: 3*27 = 81 and 3+27 = 30
81
81 = 34 = 92 = 65610.5
The only pair of positive single-digit numbers which give a product of 81 are 9 and 9.
9^2 is 81 and 3^4 is 81
1 x 81 3 x 27 9 x 9
3^4 or 9^2
34, 811, 92
1 and 567 or 81 and 7
-9 and -9 multiply to get 81. ■
81*4 = 324