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