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분수: 분모가 다른 덧셈2분수1

1
1 8
+
3 9
=
33 72
1
+
3
=
11 24
2
3 9
+
5 2
=
51 18
3
+
5
=
17 6
3
5 2
+
1 3
=
17 6
4
1 3
+
2 5
=
11 15
5
2 5
+
5 2
=
29 10
6
5 2
+
3 4
=
13 4
7
3 4
+
5 5
=
35 20
3
+
5
=
7 4
8
5 5
+
4 6
=
50 30
5
+
4
=
5 3
9
4 6
+
2 7
=
40 42
4
+
2
=
20 21
10
2 7
+
5 4
=
43 28
11
4 4
+
1 6
=
14 12
4
+
1
=
7 6
12
1 6
+
2 3
=
5 6
13
2 3
+
7 7
=
35 21
2
+
7
=
5 3
14
7 7
+
2 5
=
49 35
7
+
2
=
7 5
15
5 5
+
1 4
=
25 20
5
+
1
=
5 4