11-5=
[ ]
A.5
B.6
C.7
D.8
14-6=
13-8=
13-5=
A.6
B.8
C.9
D.13
13-4=
15-9=
12-3=
A.7
B.9
C.15
16-7=
12-5=
14-5=
A.8
D.19