54
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
104 - 26 _____ 078
600 - 104 = 496
160 - 104 = 56
It is: 275-104 = 171
Whenever you minus a negative (number), you add. So it would be 104 - (-13), or 104 + 13, which is 117