| 1. | 20 - 1 = |
15
|
10
|
13
|
19
|
| 2. | 16 - 10 = |
6
|
10
|
2
|
8
|
| 3. | 19 - 9 = |
7
|
10
|
9
|
8
|
| 4. | 18 - 5 = |
19
|
16
|
20
|
13
|
| 5. | 18 - 13 = |
2
|
4
|
1
|
5
|
| 6. | 11 - 3 = |
8
|
10
|
2
|
3
|
| 7. | 17 - 5 = |
17
|
12
|
10
|
11
|
| 8. | 13 - 7 = |
4
|
3
|
6
|
5
|
| 9. | 19 - 8 = |
18
|
11
|
20
|
13
|
| 10. | 19 - 19 = |
3
|
10
|
6
|
0
|
| 11. | 15 - 3 = |
12
|
19
|
16
|
20
|
| 12. | 12 - 3 = |
5
|
3
|
1
|
9
|
| 1. | 20 - 1 = |
15
|
10
|
13
|
19
|
| 2. | 16 - 10 = |
6
|
10
|
2
|
8
|
| 3. | 19 - 9 = |
7
|
10
|
9
|
8
|
| 4. | 18 - 5 = |
19
|
16
|
20
|
13
|
| 5. | 18 - 13 = |
2
|
4
|
1
|
5
|
| 6. | 11 - 3 = |
8
|
10
|
2
|
3
|
| 7. | 17 - 5 = |
17
|
12
|
10
|
11
|
| 8. | 13 - 7 = |
4
|
3
|
6
|
5
|
| 9. | 19 - 8 = |
18
|
11
|
20
|
13
|
| 10. | 19 - 19 = |
3
|
10
|
6
|
0
|
| 11. | 15 - 3 = |
12
|
19
|
16
|
20
|
| 12. | 12 - 3 = |
5
|
3
|
1
|
9
|