1.
50 + 31 =
2
81
|
2.
33 – 7 =
2
26
|
3.
61 + 39 =
100
2
|
4.
35 – 20 =
15
1
|
5.
52 + 5 =
2
57
|
6.
100 – 90 =
10
1
|
7.
21 + 8 =
29
2
|
8.
65 – 63 =
1
2
|
9.
85 – 37 =
2
48
|
10.
26 + 39 =
2
65
|
11.
90 – 10 =
2
80
|
12.
60 – 50 =
1
10
|
13.
97 – 57 =
2
40
|
14.
79 – 35 =
2
44
|
15.
43 – 2 =
41
2
|
16.
10 – 0 =
10
1
|
17.
79 – 10 =
2
69
|
18.
76 + 7 =
83
2
|
19.
52 + 11 =
63
2
|
20.
19 + 50 =
2
69
|
1.
50 + 31 =
2
81
|
2.
33 – 7 =
2
26
|
3.
61 + 39 =
100
2
|
4.
35 – 20 =
15
1
|
5.
52 + 5 =
2
57
|
6.
100 – 90 =
10
1
|
7.
21 + 8 =
29
2
|
8.
65 – 63 =
1
2
|
9.
85 – 37 =
2
48
|
10.
26 + 39 =
2
65
|
11.
90 – 10 =
2
80
|
12.
60 – 50 =
1
10
|
13.
97 – 57 =
2
40
|
14.
79 – 35 =
2
44
|
15.
43 – 2 =
41
2
|
16.
10 – 0 =
10
1
|
17.
79 – 10 =
2
69
|
18.
76 + 7 =
83
2
|
19.
52 + 11 =
63
2
|
20.
19 + 50 =
2
69
|