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