Here are a few examples:
81 pennies
80 pennies + 1 nickel
79 pennies + 1 dime + 1 nickel
78 pennies + 1 quarter + 1 nickel + 1 penny
81 nickels
16 quarters + 1 penny
16 dimes + 1 nickel + 1 penny
8 half dollars + 1 penny
6 half dollars + 3 quarters + 1 nickel + 1 penny
81/100
81
81 = 34 = 92 = 65610.5
1 x 81 3 x 27 9 x 9
34, 811, 92
1 times 81 and 9 times 9 (assuming you meant only whole numbers)
81 cents, 82 cents, 83 cents...
81
eighty-one times one and nine times nine
You can't with U.S money.
Ten percent of 48 dollars and ten cents is 4 dollars and 81 cents.
Without exponentsWith exponentsIn word form