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분수: 분모가 다른 덧셈4분수3

1
4 3
+
5 7
=
43 21
2
5 7
+
4 3
=
43 21
3
4 3
+
5 4
=
31 12
4
5 4
+
1 2
=
7 4
5
1 2
+
4 5
=
13 10
6
4 5
+
2 8
=
42 40
4
+
2
=
21 20
7
2 8
+
8 4
=
18 8
2
+
8
=
9 4
8
7 4
+
1 3
=
25 12
9
1 3
+
5 5
=
20 15
1
+
5
=
4 3
10
5 5
+
9 2
=
55 10
5
+
9
=
11 2
11
9 2
+
8 5
=
61 10
12
8 5
+
3 3
=
39 15
8
+
3
=
13 5
13
1 6
+
3 7
=
25 42
14
3 7
+
1 4
=
19 28
15
1 4
+
3 6
=
9 12
1
+
3
=
3 4