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