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분수: 분모가 다른 덧셈3분수3

1
3 3
+
5 4
=
27 12
3
+
5
=
9 4
2
5 4
+
2 7
=
43 28
3
2 7
+
6 6
=
54 42
2
+
6
=
9 7
4
6 6
+
5 2
=
21 6
6
+
5
=
7 2
5
5 2
+
4 4
=
14 4
5
+
4
=
7 2
6
5 4
+
2 7
=
43 28
7
2 7
+
7 4
=
57 28
8
3 4
+
2 6
=
13 12
9
2 6
+
1 4
=
7 12
10
1 4
+
3 2
=
7 4
11
3 2
+
9 6
=
18 6
3
+
9
=
3
12
9 6
+
3 4
=
27 12
9
+
3
=
9 4
13
1 4
+
4 3
=
19 12
14
4 3
+
3 7
=
37 21
15
3 7
+
4 3
=
37 21