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분수: 분모가 다른 덧셈4분수7

1
7 4
+
2 7
=
57 28
2
2 7
+
3 4
=
29 28
3
3 4
+
8 7
=
53 28
4
8 7
+
1 8
=
71 56
5
1 2
+
6 7
=
19 14
6
6 7
+
3 3
=
39 21
6
+
3
=
13 7
7
3 3
+
2 8
=
30 24
3
+
2
=
5 4
8
2 8
+
1 5
=
18 40
2
+
1
=
9 20
9
1 5
+
3 4
=
19 20
10
1 2
+
9 8
=
13 8
11
9 8
+
2 4
=
13 8
12
4 2
+
1 8
=
17 8
13
1 2
+
3 4
=
5 4
14
3 4
+
1 2
=
5 4
15
1 2
+
5 5
=
15 10
1
+
5
=
3 2