392 minus 158 is 234.
137 minus 104 is 33.
104 minus 13 is 91.
It is: 158-237 = -79
180 - 158 = 22
168 - 158 = 10
It is: 167 minus 158 = 9
160 - 104 = 56
104 - 26 _____ 078
It is: 275-104 = 171
600 - 104 = 496
to solve this, simply subtract 158 from 2000. If you do this, you will get 1842