1.
20 – 8 =
10
12
|
2.
1 – 1 =
0
2
|
3.
? – 4 = 6
10
13
|
4.
? – 15 = 10
25
21
|
5.
42 – 23 =
3
19
|
6.
? – 15 = 18
27
33
|
7.
? – 31 = 2
33
25
|
8.
2 – 2 =
5
0
|
9.
38 – 23 =
9
15
|
10.
? – 18 = 0
15
18
|
11.
? – 42 = 3
45
4
|
12.
? – 20 = 27
38
47
|
13.
44 – 43 =
1
2
|
14.
3 – 1 =
7
2
|
15.
42 – 24 =
18
2
|
16.
? – 1 = 4
5
8
|
17.
? – 15 = 25
7
40
|
18.
? – 10 = 13
22
23
|
19.
15 – 0 =
7
15
|
20.
? – 31 = 13
14
44
|
1.
20 – 8 =
10
12
|
2.
1 – 1 =
0
2
|
3.
? – 4 = 6
10
13
|
4.
? – 15 = 10
25
21
|
5.
42 – 23 =
3
19
|
6.
? – 15 = 18
27
33
|
7.
? – 31 = 2
33
25
|
8.
2 – 2 =
5
0
|
9.
38 – 23 =
9
15
|
10.
? – 18 = 0
15
18
|
11.
? – 42 = 3
45
4
|
12.
? – 20 = 27
38
47
|
13.
44 – 43 =
1
2
|
14.
3 – 1 =
7
2
|
15.
42 – 24 =
18
2
|
16.
? – 1 = 4
5
8
|
17.
? – 15 = 25
7
40
|
18.
? – 10 = 13
22
23
|
19.
15 – 0 =
7
15
|
20.
? – 31 = 13
14
44
|