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Choose # of digits
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17
98
13
+
34
91
92
99
+
-63
8
+
91
3
+
3
5
+
22
18
+
64
80
79
87
10
8
+
22
40
+
-11
14
+
35
77
+
-54
34
32
79
41
71
+
-61
60
+
-51
52
+
0
4
+
78
14
40
59
34
12
29
27
62
58
66