2+3+5+13+2/99+11/63+25/35+5/15=_.

问题描述:

2+3+5+13+

2
99
+
11
63
+
25
35
+
5
15
=______.

2+3+5+13+

2
99
+
11
63
+
25
35
+
5
15

=2+3+5+13+
2
99
+
2
63
+
9
63
+
5
7
+
1
3

=23+
1
9
-
1
11
+
1
7
-
1
9
+
1
7
+
5
7
+
1
3

=23-
1
11
+1+
1
3

=24-
3
33
+
11
33

=24+
8
33

=24
8
33