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