Take away 100 and add one...
It is: 132 minus 99 = 33
177
1,000 minus 99 is 901.
186 - 9 = 177
1001 - 99 = 902
111 minus 99 is 12.
145 - 99 = 46
99 - 83 = 16
108 - 99 = 9
If you mean 198 minus 99 then it is 99
100 - 1 = 99.
Answer is 466 947 minus 658 = 289 289 + 177 = 466