题目内容

1
5
+
1
5
9
17
+
6
17
6
7
-
3
7
17
19
-
12
19
1-
5
12
13
13
-1
56
100
+
31
100
-
72
100
56
73
-
29
73
-
17
73
1-
13
19
+
8
19
16
25
-
13
25
+
9
25
1
5
+
1
5
=
2
5
9
17
+
6
17
=1,
6
7
-
3
7
=
3
7
17
19
-
12
19
=
5
19
1-
5
12
=
7
12
13
13
-1=0,
56
100
+
31
100
-
72
100
=
3
20
56
73
-
29
73
-
17
73
=
10
73
1-
13
19
+
8
19
=
14
19
16
25
-
13
25
+
9
25
=
12
25
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