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