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