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