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