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