10+1 13-1 9+2
7+8 15-4 4+9
2-1=
6+2=
8+8=
6-5+4=
8+5=
10-1=
6+7=
7+0-2=
14-3=
7+8=
16-3=
8+2+3=
9+8=
15-5=
9+5=
6+8-4=
3+7 14 6+5+3
16-4 10 13-3-4
7+7 6 9+8-5
8-2 12 9-5+6