1.
1 – 1 =
1
0
|
2.
1 – 1 =
4
0
|
3.
6 – 2 =
4
6
|
4.
10 – 9 =
1
3
|
5.
7 – 0 =
9
7
|
6.
8 – 0 =
3
8
|
7.
8 – 5 =
2
3
|
8.
9 – 0 =
2
9
|
9.
5 – 3 =
6
2
|
10.
8 – 4 =
4
3
|
11.
4 – 2 =
2
1
|
12.
3 – 3 =
2
0
|
13.
7 – 1 =
8
6
|
14.
7 – 7 =
5
0
|
15.
5 – 2 =
3
4
|
16.
3 – 0 =
2
3
|
17.
6 – 5 =
2
1
|
18.
4 – 3 =
5
1
|
19.
5 – 5 =
2
0
|
20.
5 – 4 =
1
6
|
1.
1 – 1 =
1
0
|
2.
1 – 1 =
4
0
|
3.
6 – 2 =
4
6
|
4.
10 – 9 =
1
3
|
5.
7 – 0 =
9
7
|
6.
8 – 0 =
3
8
|
7.
8 – 5 =
2
3
|
8.
9 – 0 =
2
9
|
9.
5 – 3 =
6
2
|
10.
8 – 4 =
4
3
|
11.
4 – 2 =
2
1
|
12.
3 – 3 =
2
0
|
13.
7 – 1 =
8
6
|
14.
7 – 7 =
5
0
|
15.
5 – 2 =
3
4
|
16.
3 – 0 =
2
3
|
17.
6 – 5 =
2
1
|
18.
4 – 3 =
5
1
|
19.
5 – 5 =
2
0
|
20.
5 – 4 =
1
6
|