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