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분수: 분모가 다른 덧셈3분수9

1
3 9
+
1 7
=
30 63
3
+
1
=
10 21
2
1 7
+
3 5
=
26 35
3
3 5
+
9 3
=
54 15
3
+
9
=
18 5
4
9 3
+
2 7
=
69 21
9
+
2
=
23 7
5
6 2
+
8 4
=
20 4
6
+
8
=
5
6
4 8
+
2 6
=
20 24
4
+
2
=
5 6
7
2 6
+
9 5
=
64 30
2
+
9
=
32 15
8
9 5
+
3 4
=
51 20
9
3 4
+
5 3
=
29 12
10
1 5
+
4 6
=
26 30
1
+
4
=
13 15
11
4 6
+
3 9
=
18 18
4
+
3
=
1
12
3 9
+
9 7
=
102 63
3
+
9
=
34 21
13
9 7
+
7 6
=
103 42
14
8 6
+
1 7
=
62 42
8
+
1
=
31 21
15
1 7
+
5 4
=
39 28