1.
13 + 64 =
2
77
|
2.
31 – 16 =
15
1
|
3.
11 – 6 =
5
1
|
4.
63 – 15 =
2
48
|
5.
68 – 29 =
39
2
|
6.
74 + 15 =
2
89
|
7.
84 – 9 =
2
75
|
8.
73 – 39 =
2
34
|
9.
54 – 33 =
21
2
|
10.
19 + 70 =
2
89
|
11.
30 + 5 =
35
2
|
12.
78 + 7 =
2
85
|
13.
4 – 1 =
1
3
|
14.
100 + 0 =
2
100
|
15.
75 + 4 =
79
2
|
16.
42 + 2 =
2
44
|
17.
33 – 16 =
2
17
|
18.
84 – 37 =
47
2
|
19.
65 – 40 =
25
2
|
20.
7 – 3 =
1
4
|
1.
13 + 64 =
2
77
|
2.
31 – 16 =
15
1
|
3.
11 – 6 =
5
1
|
4.
63 – 15 =
2
48
|
5.
68 – 29 =
39
2
|
6.
74 + 15 =
2
89
|
7.
84 – 9 =
2
75
|
8.
73 – 39 =
2
34
|
9.
54 – 33 =
21
2
|
10.
19 + 70 =
2
89
|
11.
30 + 5 =
35
2
|
12.
78 + 7 =
2
85
|
13.
4 – 1 =
1
3
|
14.
100 + 0 =
2
100
|
15.
75 + 4 =
79
2
|
16.
42 + 2 =
2
44
|
17.
33 – 16 =
2
17
|
18.
84 – 37 =
47
2
|
19.
65 – 40 =
25
2
|
20.
7 – 3 =
1
4
|