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