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분수: 분모가 다른 덧셈2분수1

1
1 2
+
5 7
=
17 14
2
5 7
+
8 6
=
86 42
5
+
8
=
43 21
3
8 6
+
3 7
=
74 42
8
+
3
=
37 21
4
3 7
+
2 2
=
20 14
3
+
2
=
10 7
5
6 2
+
3 7
=
48 14
6
+
3
=
24 7
6
1 9
+
4 6
=
14 18
1
+
4
=
7 9
7
4 6
+
8 3
=
20 6
4
+
8
=
10 3
8
8 3
+
3 7
=
65 21
9
3 7
+
1 2
=
13 14
10
1 2
+
3 6
=
6 6
1
+
3
=
1
11
3 6
+
1 3
=
5 6
12
4 3
+
1 7
=
31 21
13
1 7
+
2 9
=
23 63
14
9 2
+
3 7
=
69 14
15
7 3
+
4 6
=
18 6
7
+
4
=
3