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