55 - 5 =
50
13 ... 31
13 < 31
20 + 20 =
40
56 - 6 =
50
10+10+10+10+10+10+10 =
70
50 + 50 =
100
100...100
100 = 100
35 - 5=
30
100 - 10 =
90
22 - 20 =
2
33 - 33 =
0
80 - 80 =
0
10 + 90 =
100
28 - 1 =
27
67 - 60 =
7
63 - 3 =
60
7 + 30 =
37
90 + 10 =
100
42 - 40 =
2
60 ... 34
60 > 34
78 - 8 =
70
17 + 1 =
18
15 + 15 =
30
28 + 1 =
29
94 - 1 =
93
25 + 1 ... 24 + 2
25 + 1 = 24 + 2