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분수: 분모가 다른 덧셈1분수2

1
1 3
+
2 7
=
13 21
2
7 4
+
1 3
=
25 12
3
1 3
+
6 6
=
8 6
1
+
6
=
4 3
4
6 6
+
9 2
=
33 6
6
+
9
=
11 2
5
9 2
+
8 7
=
79 14
6
8 7
+
1 5
=
47 35
7
1 5
+
3 6
=
21 30
1
+
3
=
7 10
8
3 6
+
8 3
=
19 6
9
8 3
+
9 9
=
33 9
8
+
9
=
11 3
10
9 9
+
5 3
=
24 9
9
+
5
=
8 3
11
5 3
+
1 5
=
28 15
12
1 5
+
8 2
=
42 10
1
+
8
=
21 5
13
8 2
+
9 5
=
58 10
8
+
9
=
29 5
14
9 5
+
7 4
=
71 20
15
7 4
+
2 3
=
29 12