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분수: 분모가 다른 덧셈2분수1

1
1 4
+
3 9
=
21 36
1
+
3
=
7 12
2
3 9
+
5 5
=
60 45
3
+
5
=
4 3
3
5 2
+
1 6
=
16 6
5
+
1
=
8 3
4
2 4
+
1 8
=
5 8
5
1 8
+
5 7
=
47 56
6
5 7
+
9 5
=
88 35
7
5 9
+
2 2
=
28 18
5
+
2
=
14 9
8
4 2
+
5 7
=
38 14
4
+
5
=
19 7
9
5 7
+
8 3
=
71 21
10
8 3
+
9 2
=
43 6
11
9 2
+
8 8
=
44 8
9
+
8
=
11 2
12
1 5
+
5 3
=
28 15
13
5 3
+
8 5
=
49 15
14
8 5
+
2 4
=
42 20
8
+
2
=
21 10
15
2 4
+
1 5
=
14 20
2
+
1
=
7 10