Can you come up with atleast 5 different solutions?

Question

The object of this puzzle is to arranger four nines (9) so that their collective value equals 100. Cna you come up woht at least five different solutions to this problem and thereby make the goal?

Answer 1

Here's some ways:
99 + 9/9 = 100
9! / 9! + 99 = 100
99.99... = 100
9.9... x 9.9... = 100
99 + (9-9)! = 100

Answer 2

Simply use two of the 9's as 99 then perform some function on the other two 9's and divide one by the other

99 + 9/9
99 + 9!/9!
99 + sqrt(9)/sqrt(9)
99 + (9/9)!
99 + (9 - 9)!
99 + sqrt(9/9)

I could then go into factorials of the square roots, square roots of factorials etc. performing functions that f(1) = 1

Answer 3

floor(99.9 + .9)