| 1. | 15 - 13 = |
10
|
6
|
2
|
5
|
| 2. | 10 - 3 = |
10
|
1
|
7
|
2
|
| 3. | 10 - 4 = |
9
|
4
|
7
|
6
|
| 4. | 18 - 10 = |
5
|
3
|
9
|
8
|
| 5. | 8 - 2 = |
10
|
6
|
8
|
1
|
| 6. | 20 - 2 = |
19
|
18
|
13
|
15
|
| 7. | 18 - 17 = |
3
|
10
|
1
|
7
|
| 8. | 9 - 7 = |
4
|
9
|
7
|
2
|
| 9. | 20 - 19 = |
4
|
7
|
10
|
1
|
| 10. | 20 - 6 = |
16
|
20
|
18
|
14
|
| 11. | 20 - 13 = |
7
|
1
|
6
|
4
|
| 12. | 4 - 1 = |
7
|
5
|
9
|
3
|
| 1. | 15 - 13 = |
10
|
6
|
2
|
5
|
| 2. | 10 - 3 = |
10
|
1
|
7
|
2
|
| 3. | 10 - 4 = |
9
|
4
|
7
|
6
|
| 4. | 18 - 10 = |
5
|
3
|
9
|
8
|
| 5. | 8 - 2 = |
10
|
6
|
8
|
1
|
| 6. | 20 - 2 = |
19
|
18
|
13
|
15
|
| 7. | 18 - 17 = |
3
|
10
|
1
|
7
|
| 8. | 9 - 7 = |
4
|
9
|
7
|
2
|
| 9. | 20 - 19 = |
4
|
7
|
10
|
1
|
| 10. | 20 - 6 = |
16
|
20
|
18
|
14
|
| 11. | 20 - 13 = |
7
|
1
|
6
|
4
|
| 12. | 4 - 1 = |
7
|
5
|
9
|
3
|