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