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분수: 분모가 다른 덧셈3분수2

1
2 8
+
1 5
=
18 40
2
+
1
=
9 20
2
3 5
+
2 6
=
28 30
3
+
2
=
14 15
3
2 6
+
5 2
=
17 6
4
5 6
+
1 8
=
23 24
5
1 8
+
6 9
=
57 72
1
+
6
=
19 24
6
6 9
+
2 4
=
42 36
6
+
2
=
7 6
7
2 4
+
6 8
=
10 8
2
+
6
=
5 4
8
6 8
+
3 6
=
30 24
6
+
3
=
5 4
9
1 4
+
2 3
=
11 12
10
2 3
+
9 2
=
31 6
11
9 2
+
4 4
=
22 4
9
+
4
=
11 2
12
4 4
+
1 6
=
14 12
4
+
1
=
7 6
13
1 7
+
4 4
=
32 28
1
+
4
=
8 7
14
7 4
+
8 3
=
53 12
15
3 6
+
1 2
=
6 6
3
+
1
=
1