| 1. | 11 - 1 = |
6
|
4
|
10
|
8
|
| 2. | 20 - 1 = |
16
|
19
|
11
|
20
|
| 3. | 11 - 4 = |
7
|
1
|
8
|
6
|
| 4. | 17 - 17 = |
1
|
6
|
2
|
0
|
| 5. | 16 - 15 = |
8
|
1
|
10
|
2
|
| 6. | 20 - 13 = |
7
|
2
|
3
|
5
|
| 7. | 10 - 2 = |
2
|
8
|
4
|
6
|
| 8. | 14 - 13 = |
2
|
6
|
1
|
8
|
| 9. | 4 - 1 = |
2
|
9
|
5
|
3
|
| 10. | 4 - 4 = |
1
|
2
|
4
|
0
|
| 11. | 15 - 8 = |
5
|
7
|
10
|
9
|
| 12. | 9 - 6 = |
8
|
3
|
6
|
4
|
| 1. | 11 - 1 = |
6
|
4
|
10
|
8
|
| 2. | 20 - 1 = |
16
|
19
|
11
|
20
|
| 3. | 11 - 4 = |
7
|
1
|
8
|
6
|
| 4. | 17 - 17 = |
1
|
6
|
2
|
0
|
| 5. | 16 - 15 = |
8
|
1
|
10
|
2
|
| 6. | 20 - 13 = |
7
|
2
|
3
|
5
|
| 7. | 10 - 2 = |
2
|
8
|
4
|
6
|
| 8. | 14 - 13 = |
2
|
6
|
1
|
8
|
| 9. | 4 - 1 = |
2
|
9
|
5
|
3
|
| 10. | 4 - 4 = |
1
|
2
|
4
|
0
|
| 11. | 15 - 8 = |
5
|
7
|
10
|
9
|
| 12. | 9 - 6 = |
8
|
3
|
6
|
4
|