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