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분수: 분모가 다른 덧셈1분수2

1
8 2
+
7 4
=
23 4
2
7 4
+
4 5
=
51 20
3
4 5
+
3 2
=
23 10
4
1 6
+
5 3
=
11 6
5
3 5
+
2 3
=
19 15
6
3 2
+
4 3
=
17 6
7
3 4
+
9 5
=
51 20
8
3 5
+
5 7
=
46 35
9
5 7
+
1 3
=
22 21
10
5 3
+
4 7
=
47 21
11
4 7
+
1 3
=
19 21
12
1 3
+
9 7
=
34 21
13
9 7
+
3 6
=
75 42
9
+
3
=
25 14
14
3 6
+
7 3
=
17 6
15
7 3
+
2 8
=
62 24
7
+
2
=
31 12