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