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분수: 분모가 다른 덧셈3분수3

1
3 3
+
9 4
=
39 12
3
+
9
=
13 4
2
9 4
+
4 6
=
35 12
3
4 6
+
5 7
=
58 42
4
+
5
=
29 21
4
5 7
+
4 3
=
43 21
5
1 8
+
5 7
=
47 56
6
5 2
+
1 3
=
17 6
7
1 3
+
5 5
=
20 15
1
+
5
=
4 3
8
5 5
+
9 7
=
80 35
5
+
9
=
16 7
9
9 7
+
4 6
=
82 42
9
+
4
=
41 21
10
6 4
+
1 2
=
8 4
6
+
1
=
2
11
6 2
+
3 8
=
27 8
12
3 8
+
1 3
=
17 24
13
3 6
+
1 4
=
9 12
3
+
1
=
3 4
14
1 4
+
4 5
=
21 20
15
4 5
+
2 2
=
18 10
4
+
2
=
9 5