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분수: 분모가 다른 덧셈2분수1

1
1 2
+
3 7
=
13 14
2
1 8
+
4 9
=
41 72
3
9 4
+
4 7
=
79 28
4
4 7
+
2 6
=
38 42
4
+
2
=
19 21
5
2 6
+
3 4
=
13 12
6
3 4
+
5 2
=
13 4
7
5 2
+
2 6
=
17 6
8
2 6
+
1 7
=
20 42
2
+
1
=
10 21
9
1 7
+
6 9
=
51 63
1
+
6
=
17 21
10
6 9
+
5 2
=
57 18
6
+
5
=
19 6
11
5 2
+
9 4
=
19 4
12
4 5
+
2 6
=
34 30
4
+
2
=
17 15
13
2 6
+
6 2
=
20 6
2
+
6
=
10 3
14
1 3
+
6 4
=
22 12
1
+
6
=
11 6
15
6 4
+
1 7
=
46 28
6
+
1
=
23 14