7 + 30 =
37
33 - 33 =
0
67 - 60 =
7
94 - 1 =
93
80 - 80 =
0
10+10+10+10+10+10+10 =
70
28 - 1 =
27
50 + 50 =
100
100...100
100 = 100
90 + 10 =
100
13 ... 31
13 < 31
35 - 5=
30
56 - 6 =
50
15 + 15 =
30
78 - 8 =
70
55 - 5 =
50
17 + 1 =
18