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분수: 분모가 다른 덧셈3분수3

1
3 9
+
1 5
=
24 45
3
+
1
=
8 15
2
1 5
+
3 3
=
18 15
1
+
3
=
6 5
3
3 3
+
6 4
=
30 12
3
+
6
=
5 2
4
6 4
+
7 2
=
20 4
6
+
7
=
5
5
7 2
+
5 3
=
31 6
6
3 5
+
1 3
=
14 15
7
1 3
+
3 6
=
5 6
8
3 6
+
9 3
=
21 6
3
+
9
=
7 2
9
9 3
+
5 4
=
51 12
9
+
5
=
17 4
10
5 4
+
1 3
=
19 12
11
1 3
+
5 4
=
19 12
12
5 4
+
7 2
=
19 4
13
7 2
+
4 5
=
43 10
14
5 2
+
4 3
=
23 6
15
4 3
+
3 5
=
29 15