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분수: 분모가 다른 덧셈2분수1

1
1 4
+
3 9
=
21 36
1
+
3
=
7 12
2
3 9
+
4 3
=
15 9
3
+
4
=
5 3
3
3 8
+
1 4
=
5 8
4
1 4
+
2 8
=
4 8
1
+
2
=
1 2
5
2 8
+
7 2
=
30 8
2
+
7
=
15 4
6
2 9
+
1 7
=
23 63
7
1 7
+
5 6
=
41 42
8
1 2
+
5 7
=
17 14
9
5 7
+
3 8
=
61 56
10
3 8
+
5 5
=
55 40
3
+
5
=
11 8
11
1 2
+
5 6
=
8 6
1
+
5
=
4 3
12
5 6
+
1 2
=
8 6
5
+
1
=
4 3
13
5 2
+
9 5
=
43 10
14
5 5
+
1 2
=
15 10
5
+
1
=
3 2
15
1 2
+
2 9
=
13 18