It is: 167 minus 158 = 9
392 minus 158 is 234.
10 minus negative 10 equals 20: 10 - (-10) = 20 or rather 10 + 10 = 20. 10- (minus 10) = 20
19 minus 6 equals 13.
1540 minus 10% of it gives 1386.
It is: 158-237 = -79
180 - 158 = 22
30
Seven minus a negative six equals a positive one
3.5111
It can be: 5+10-5 = 10
It is possible.