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