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분수: 분모가 다른 덧셈9분수4

1
9 4
+
1 7
=
67 28
2
1 7
+
3 6
=
27 42
1
+
3
=
9 14
3
3 6
+
1 2
=
6 6
3
+
1
=
1
4
6 2
+
8 4
=
20 4
6
+
8
=
5
5
1 4
+
9 2
=
19 4
6
2 2
+
9 7
=
32 14
2
+
9
=
16 7
7
9 7
+
1 8
=
79 56
8
1 8
+
2 9
=
25 72
9
9 2
+
3 9
=
87 18
9
+
3
=
29 6
10
3 9
+
9 2
=
87 18
3
+
9
=
29 6
11
1 2
+
6 7
=
19 14
12
2 7
+
8 2
=
60 14
2
+
8
=
30 7
13
2 2
+
1 3
=
8 6
2
+
1
=
4 3
14
1 3
+
7 9
=
10 9
15
9 3
+
1 4
=
39 12
9
+
1
=
13 4