|
1.
31 – 0 =
2
31
|
2.
30 + 12 =
2
42
|
3.
46 + 2 =
2
48
|
4.
11 – 1 =
1
10
|
|
5.
16 – 12 =
1
4
|
6.
9 – 9 =
2
0
|
7.
39 – 39 =
0
2
|
8.
48 – 2 =
2
46
|
|
9.
10 – 6 =
1
4
|
10.
37 + 9 =
2
46
|
11.
28 – 19 =
9
1
|
12.
43 – 22 =
2
21
|
|
13.
48 + 1 =
2
49
|
14.
9 + 21 =
30
2
|
15.
44 + 6 =
50
2
|
16.
5 – 1 =
1
4
|
|
17.
28 – 16 =
1
12
|
18.
17 – 8 =
9
1
|
19.
27 – 1 =
26
2
|
20.
50 – 5 =
2
45
|
|
1.
31 – 0 =
2
31
|
2.
30 + 12 =
2
42
|
3.
46 + 2 =
2
48
|
4.
11 – 1 =
1
10
|
|
5.
16 – 12 =
1
4
|
6.
9 – 9 =
2
0
|
7.
39 – 39 =
0
2
|
8.
48 – 2 =
2
46
|
|
9.
10 – 6 =
1
4
|
10.
37 + 9 =
2
46
|
11.
28 – 19 =
9
1
|
12.
43 – 22 =
2
21
|
|
13.
48 + 1 =
2
49
|
14.
9 + 21 =
30
2
|
15.
44 + 6 =
50
2
|
16.
5 – 1 =
1
4
|
|
17.
28 – 16 =
1
12
|
18.
17 – 8 =
9
1
|
19.
27 – 1 =
26
2
|
20.
50 – 5 =
2
45
|