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