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