7
+
57
=
8
+
2
=
28
+
46
=
71
+
17
=
30
+
67
=
1
+
0
=
19
+
7
=
6
+
81
=
75
+
17
=
19
+
9
=
21
+
77
=
36
+
1
=
2
+
51
=
24
+
66
=
60
+
7
=
11
+
5
=
7
+
23
=
73
+
3
=
2
+
5
=
46
+
17
=