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