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