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분수: 분모가 다른 덧셈3분수3

1
3 5
+
1 3
=
14 15
2
1 3
+
5 7
=
22 21
3
5 7
+
8 4
=
76 28
5
+
8
=
19 7
4
8 4
+
3 5
=
52 20
8
+
3
=
13 5
5
3 5
+
1 2
=
11 10
6
8 2
+
2 9
=
76 18
8
+
2
=
38 9
7
9 2
+
1 8
=
37 8
8
5 5
+
1 8
=
45 40
5
+
1
=
9 8
9
1 8
+
9 4
=
19 8
10
7 4
+
9 2
=
25 4
11
2 3
+
1 2
=
7 6
12
1 2
+
5 3
=
13 6
13
3 4
+
1 3
=
13 12
14
1 3
+
6 4
=
22 12
1
+
6
=
11 6
15
4 6
+
1 9
=
14 18
4
+
1
=
7 9