Expressed in figures, this is equal to 8,100,000.
80+1= 81
81 = 8.1 x 101
81,000,000,000,000
81 = 92 or 8.1 × 101
Three ways of writing 81 with exponents are: 92, 34, and 32 X 32.You could also write it as 8.1 x101.
81 is a whole number whose simplest form is 81.
81+0=81
Just writing "81" is mathematical enough for my taste. After all, that's a number, and numbers are mathematical.
80+1= 81
Without exponentsWith exponentsIn word form
81 = 8.1 x 101
81/100
No, -81 is not an irrational number because it can be represented in the form x/y = -81
roughly 81 million.
81,000,000,000,000
3
81/100