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분수: 분모가 다른 덧셈1분수3

1
3 2
+
1 7
=
23 14
2
1 7
+
2 4
=
18 28
1
+
2
=
9 14
3
2 4
+
7 8
=
11 8
4
7 8
+
4 5
=
67 40
5
4 5
+
1 4
=
21 20
6
4 3
+
1 4
=
19 12
7
1 4
+
3 2
=
7 4
8
2 3
+
9 4
=
35 12
9
9 4
+
6 6
=
39 12
9
+
6
=
13 4
10
6 6
+
2 4
=
18 12
6
+
2
=
3 2
11
1 8
+
2 3
=
19 24
12
2 3
+
7 6
=
11 6
13
7 6
+
1 2
=
10 6
7
+
1
=
5 3
14
1 2
+
7 3
=
17 6
15
7 3
+
4 8
=
68 24
7
+
4
=
17 6