Answer:
117
Explanation:
you can find this answer using guess and check
numbers that are greater than 110 and less than 120 are 111, 112, 113, 114, 115, 116, 117,118, and 119
the number has the sum of the digits as 9
111- 1+1+1=3
112-1+1+2=4
113-1+1+3=5
114-1+1+4=6
115-1+1+5=7
116-1+1+6=8
117-1+1+7=9
117 is the number