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분수: 분모가 다른 덧셈3분수6

1
6 3
+
3 7
=
51 21
6
+
3
=
17 7
2
7 3
+
9 2
=
41 6
3
9 2
+
1 8
=
37 8
4
1 8
+
9 5
=
77 40
5
9 5
+
4 4
=
56 20
9
+
4
=
14 5
6
3 6
+
1 4
=
9 12
3
+
1
=
3 4
7
4 7
+
1 9
=
43 63
8
9 7
+
1 5
=
52 35
9
1 5
+
9 6
=
51 30
1
+
9
=
17 10
10
9 6
+
2 2
=
15 6
9
+
2
=
5 2
11
3 2
+
1 7
=
23 14
12
5 2
+
1 7
=
37 14
13
7 7
+
1 4
=
35 28
7
+
1
=
5 4
14
1 4
+
6 5
=
29 20
15
6 5
+
1 2
=
17 10