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