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분수: 분모가 다른 덧셈2분수3

1
1 5
+
4 7
=
27 35
2
4 7
+
7 3
=
61 21
3
7 3
+
4 4
=
40 12
7
+
4
=
10 3
4
4 4
+
5 7
=
48 28
4
+
5
=
12 7
5
5 7
+
3 4
=
41 28
6
3 4
+
1 9
=
31 36
7
1 4
+
3 9
=
21 36
1
+
3
=
7 12
8
1 7
+
9 4
=
67 28
9
9 4
+
7 3
=
55 12
10
3 6
+
1 9
=
11 18
11
1 6
+
5 7
=
37 42
12
7 5
+
4 4
=
48 20
7
+
4
=
12 5
13
4 4
+
6 2
=
16 4
4
+
6
=
4
14
6 2
+
8 8
=
32 8
6
+
8
=
4
15
8 8
+
4 2
=
24 8
8
+
4
=
3