Doing Addition & Subtraction

3+9=12✓ 12+4=16✓ 12-1=11✓ 5-3=2 ✓ 12+11=23✓ 4+9=13✓

1+9=10✓ 11+7=18✓ 6-1=5 ✓ 10-0=10✓ 7+10=17✓ 3+0=3✓

9+7=16✓ 9+10=19✓ 8-5=3 ✓ 5-3=2 ✓ 1+10=11✓ 2+3=5✓

8+7=15✓ 0+5=5 ✓ 11-0=11✓ 12-2=10✓ 0+12=12✓ 1+6=7✓

3+8=11✓ 12+12=24✓ 4-1=3 ✓ 10-3=7 ✓ 7+12=19✓ 12+0=12✓

1+6=7 ✓ 11+2=13✓ 11-1=10✓ 8-3=5 ✓ 2+11=13✓ 11+3=14✓

9+6=15✓ 9+6=15✓ 6-4=2 ✓ 4-0=4 ✓ 10+0=10✓ 7+7=14✓

3+7=10✓ 8+9=17✓ 7-0=7 ✓ 4-2=2 ✓ 5+0=5 ✓ 6+10=16✓

11+0=11✓ 7+12=19✓ 8-6=14 ✓ 11-1=10✓ 3+12=15✓ 5+0=5✓

6+1=7 ✓ 6+3=9 ✓ 9-2=11 ✓ 9-2=7 ✓ 11+2=13✓ 3+4=7✓

4+1=5✓ 5+6=11✓ 12-6=6 ✓ 9-7=2 ✓ 6+1=7 ✓ 2+7=9✓