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분수: 분모가 다른 덧셈4분수4

1
9 4
+
1 7
=
67 28
2
1 7
+
2 6
=
20 42
1
+
2
=
10 21
3
2 6
+
3 5
=
28 30
2
+
3
=
14 15
4
7 5
+
3 9
=
78 45
7
+
3
=
26 15
5
3 9
+
4 4
=
48 36
3
+
4
=
4 3
6
4 7
+
1 6
=
31 42
7
1 4
+
6 2
=
13 4
8
2 3
+
1 9
=
7 9
9
1 2
+
8 9
=
25 18
10
2 9
+
5 4
=
53 36
11
4 2
+
7 5
=
34 10
4
+
7
=
17 5
12
5 2
+
1 6
=
16 6
5
+
1
=
8 3
13
1 6
+
3 3
=
7 6
14
4 3
+
2 4
=
22 12
4
+
2
=
11 6
15
2 4
+
5 3
=
26 12
2
+
5
=
13 6