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분수: 분모가 다른 덧셈2분수4

1
4 3
+
1 7
=
31 21
2
1 7
+
4 4
=
32 28
1
+
4
=
8 7
3
4 4
+
8 6
=
28 12
4
+
8
=
7 3
4
8 6
+
7 3
=
22 6
8
+
7
=
11 3
5
3 7
+
9 2
=
69 14
6
2 4
+
6 2
=
14 4
2
+
6
=
7 2
7
6 2
+
2 6
=
20 6
6
+
2
=
10 3
8
6 3
+
1 8
=
51 24
6
+
1
=
17 8
9
1 8
+
5 9
=
49 72
10
5 9
+
4 4
=
56 36
5
+
4
=
14 9
11
4 5
+
1 4
=
21 20
12
1 8
+
9 3
=
75 24
1
+
9
=
25 8
13
9 3
+
6 4
=
54 12
9
+
6
=
9 2
14
6 4
+
2 3
=
26 12
6
+
2
=
13 6
15
3 2
+
9 9
=
45 18
3
+
9
=
5 2