Yes, "thirty-fifth" is hyphenated when used as a compound adjective before a noun or as a noun itself. For example, you would say "the thirty-fifth anniversary." However, when it stands alone as a noun, it can be written without the hyphen as "thirty fifth."
No, the word "thirty first floor" is not hyphenated.
No, "twelve thirty" is not hyphenated when written out as a time. It is typically written as two separate words. However, if used as a compound adjective before a noun, it may be hyphenated, such as in "a twelve-thirty appointment."
its Thirty-fifth if in the middle of a scentence and it's Thirty-Fifths if it's the beggining of a scentence
Any two or three word adjective should be hyphenated ONLY when used as an adjective. Example, "It was his thirty-second birthday." "There was a thirty second delay in rebroadcasting Carl's speech."
No. I cannot see any hyphen.
One-fifth of thirty-two is six and two-fifths.
That is the correct spelling (hyphenated) for the fractional parts "thirty-seconds" (i.e. multiples of 1/32).
One fifth multiplied by thirty is 6. 0.2 x 30 = 6
35 is spelled "thirty five". When used as an adjective, it should be hyphenated, as in "I had thirty-five marbles."
bromine
It should be hyphenated thirty-five thousand. The numeral value is 35000 or 35,000 (comma according to style).
6000.