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분수: 분모가 다른 덧셈2분수7

1
2 7
+
7 4
=
57 28
2
7 4
+
3 3
=
33 12
7
+
3
=
11 4
3
1 2
+
7 8
=
11 8
4
7 8
+
1 5
=
43 40
5
5 5
+
6 2
=
40 10
5
+
6
=
4
6
3 2
+
1 3
=
11 6
7
3 6
+
1 3
=
5 6
8
3 5
+
1 2
=
11 10
9
1 2
+
9 4
=
11 4
10
9 4
+
2 7
=
71 28
11
2 7
+
1 4
=
15 28
12
1 4
+
7 3
=
31 12
13
7 3
+
3 5
=
44 15
14
2 5
+
1 2
=
9 10
15
1 2
+
6 5
=
17 10