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