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