Yes, eighty is a noun, it's a number, a thing. The word eighty is also used as an adjective. Example uses:
Noun: From the hundred we sent out, eighty responded.
Adjective: I've already read eighty pages of the assigned material.
No, "eighty" is not a noun. It is a numeral that represents the quantity of eighty.
Eighty-six
Seven hundred eighty-five
The correct way to spell 88 is "eighty-eight."
Yes. The word eighty has both. It sounds like (ay-tee).
In French, eighty-six is said as "quatre-vingt-six."
Countable
There is no contraction in the given sentence.The noun Davies should be possessive but it has no apostrophe to indicate possession.The correct possessive form for the singular noun Davies is:Davies' or Davies's (both are accepted as correct)Examples:Davies' life lasted eighty-two years from 1913 to 1995.Davies's life lasted eighty-two years from 1913 to 1995.
The number 81 is eighty-one.Eighty one.
Eighty dollars.
I spell it as eighty-one.
0.87 = eighty-seven hundredths 0.087 = eighty-seven thousandths 0.0087 = eighty-seven ten-thousandths 0.00087 = eighty-seven hundred-thousandths 0.000087 = eighty-seven millionths
Use a calculator, the answer is 560
Eighty-one quintillion.
The number is eighty three (when used as an adjective, hyphenate as eighty-three).
eighty billion dollars eighty billion dollars eighty billion dollars
depends on the currency ... three hundred and eighty dollars and eighty cents three hundred and eighty pounds and eighty pence three hundred and eighty euros and eighty cents and so on ...
6,561.