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