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