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