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