(9*9)+(9+9)+(9/9) = 100
Five 9s:(99 x 9 + 9) / 9 = 100
You have to combine equal terms. -5r-9s+9r+3s-6 = -5r+9r-9s+3s-6 = 4r-6s-6
Take two 9s and make them a fraction like this 9/9. Then put the other two 9s together to make 99 and you get 9/9+99=100. Because 9/9=1 so it becomes 1+99=100.
Eleven.
99 plus 9/9 = 100
20
Exactly 6 of them
11
6 of them with a remainder of 4
11 with 1 remaining 100 - 1 = 99 = 9 x 11
9^2+9+9 +9/9 81+9+9+1=100
One way: 99 + 9/9 = 100