|
1.
30 – 20 =
1
10
|
2.
47 + 1 =
2
48
|
3.
18 – 10 =
1
8
|
4.
5 – 5 =
0
2
|
|
5.
13 + 10 =
23
2
|
6.
5 + 36 =
2
41
|
7.
31 + 7 =
2
38
|
8.
45 – 15 =
30
2
|
|
9.
27 + 16 =
43
2
|
10.
35 + 9 =
44
2
|
11.
44 + 4 =
2
48
|
12.
13 + 10 =
2
23
|
|
13.
39 + 10 =
49
2
|
14.
23 + 23 =
46
2
|
15.
14 + 28 =
2
42
|
16.
3 + 40 =
43
2
|
|
17.
2 – 2 =
2
0
|
18.
29 – 15 =
14
1
|
19.
20 + 15 =
35
2
|
20.
43 – 1 =
2
42
|
|
1.
30 – 20 =
1
10
|
2.
47 + 1 =
2
48
|
3.
18 – 10 =
1
8
|
4.
5 – 5 =
0
2
|
|
5.
13 + 10 =
23
2
|
6.
5 + 36 =
2
41
|
7.
31 + 7 =
2
38
|
8.
45 – 15 =
30
2
|
|
9.
27 + 16 =
43
2
|
10.
35 + 9 =
44
2
|
11.
44 + 4 =
2
48
|
12.
13 + 10 =
2
23
|
|
13.
39 + 10 =
49
2
|
14.
23 + 23 =
46
2
|
15.
14 + 28 =
2
42
|
16.
3 + 40 =
43
2
|
|
17.
2 – 2 =
2
0
|
18.
29 – 15 =
14
1
|
19.
20 + 15 =
35
2
|
20.
43 – 1 =
2
42
|