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분수: 분모가 다른 덧셈3분수1

1
1 3
+
2 7
=
13 21
2
2 7
+
4 8
=
44 56
2
+
4
=
11 14
3
4 8
+
6 5
=
68 40
4
+
6
=
17 10
4
6 5
+
9 6
=
81 30
6
+
9
=
27 10
5
9 6
+
4 5
=
69 30
9
+
4
=
23 10
6
2 5
+
1 6
=
17 30
7
6 5
+
1 8
=
53 40
8
1 8
+
3 2
=
13 8
9
2 8
+
1 5
=
18 40
2
+
1
=
9 20
10
1 5
+
6 3
=
33 15
1
+
6
=
11 5
11
6 3
+
1 2
=
15 6
6
+
1
=
5 2
12
1 2
+
4 4
=
6 4
1
+
4
=
3 2
13
4 4
+
6 7
=
52 28
4
+
6
=
13 7
14
6 7
+
3 2
=
33 14
15
3 2
+
2 4
=
8 4
3
+
2
=
2