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