Subtraction
12-7
5
-2-(-1)
-1
-2-3
-5
-4+-2
-6
4+-3
1
15-4
11
-5-(-3)
-2
13-(-9)
22
-9+-8
-17
12+-2
10
5-3
2
-9-(-2)
-7
7-(-4)
11
-3+-19
-22
-3+2
-1
21-7
14
-6-(-4)
-2
-20-(-35)
15
-9+-2
-11
6+-6
0
19-7
12
-18-(-3)
-15
-12-4
-16
-4+-10
-14
-10+14
4