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