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분수: 분모가 다른 덧셈2분수7

1
2 7
+
7 4
=
57 28
2
7 4
+
6 7
=
73 28
3
6 7
+
2 3
=
32 21
4
2 3
+
8 4
=
32 12
2
+
8
=
8 3
5
4 6
+
1 3
=
6 6
4
+
1
=
1
6
1 3
+
4 5
=
17 15
7
4 5
+
2 3
=
22 15
8
2 3
+
5 4
=
23 12
9
5 4
+
9 6
=
33 12
5
+
9
=
11 4
10
3 6
+
2 8
=
18 24
3
+
2
=
3 4
11
2 8
+
5 6
=
26 24
2
+
5
=
13 12
12
5 6
+
1 4
=
13 12
13
1 4
+
3 5
=
17 20
14
5 7
+
1 3
=
22 21
15
1 3
+
3 2
=
11 6