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분수: 분모가 다른 덧셈7분수4

1
7 4
+
8 2
=
23 4
2
8 2
+
5 4
=
21 4
3
5 4
+
4 2
=
13 4
4
4 2
+
1 4
=
9 4
5
6 4
+
1 5
=
34 20
6
+
1
=
17 10
6
1 5
+
4 9
=
29 45
7
9 4
+
2 3
=
35 12
8
2 3
+
7 2
=
25 6
9
7 2
+
1 9
=
65 18
10
1 9
+
4 3
=
13 9
11
4 3
+
2 6
=
10 6
4
+
2
=
5 3
12
2 6
+
7 4
=
25 12
13
7 4
+
2 2
=
11 4
14
2 2
+
3 3
=
12 6
2
+
3
=
2
15
3 3
+
8 9
=
17 9