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