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Eighty-one.
81+0=81
81/100
81% as a decimal is 0.81
It is: 81 = LXXXI
81,000 is 81 thousands.0.081 is 81 thousandths.
81 m2
80+1= 81
81 = 8.1 x 101
92 = 81 AND 3^4
81/100 = 0.81