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분수: 분모가 다른 덧셈3분수7

1
3 7
+
6 4
=
54 28
3
+
6
=
27 14
2
6 4
+
2 9
=
62 36
6
+
2
=
31 18
3
2 9
+
7 4
=
71 36
4
7 4
+
4 2
=
15 4
5
2 2
+
5 6
=
11 6
6
5 6
+
3 3
=
11 6
7
3 3
+
2 9
=
11 9
8
9 2
+
5 5
=
55 10
9
+
5
=
11 2
9
1 8
+
2 5
=
21 40
10
2 5
+
4 4
=
28 20
2
+
4
=
7 5
11
4 4
+
9 9
=
72 36
4
+
9
=
2
12
9 9
+
1 2
=
27 18
9
+
1
=
3 2
13
1 2
+
2 9
=
13 18
14
2 9
+
3 2
=
31 18
15
3 2
+
8 7
=
37 14