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분수: 분모가 다른 덧셈3분수7

1
3 7
+
2 2
=
20 14
3
+
2
=
10 7
2
2 2
+
6 8
=
14 8
2
+
6
=
7 4
3
6 8
+
2 9
=
70 72
6
+
2
=
35 36
4
9 6
+
1 7
=
69 42
9
+
1
=
23 14
5
7 4
+
1 6
=
23 12
6
1 6
+
5 7
=
37 42
7
5 7
+
6 6
=
72 42
5
+
6
=
12 7
8
6 6
+
3 2
=
15 6
6
+
3
=
5 2
9
3 2
+
8 7
=
37 14
10
8 7
+
1 2
=
23 14
11
1 2
+
8 5
=
21 10
12
5 8
+
4 5
=
57 40
13
4 5
+
9 2
=
53 10
14
9 2
+
4 6
=
31 6
15
4 6
+
5 9
=
22 18
4
+
5
=
11 9