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분수: 분모가 다른 덧셈2분수5

1
2 5
+
3 8
=
31 40
2
8 3
+
3 9
=
27 9
8
+
3
=
3
3
3 9
+
5 8
=
69 72
3
+
5
=
23 24
4
5 8
+
1 3
=
23 24
5
1 3
+
4 4
=
16 12
1
+
4
=
4 3
6
1 4
+
6 2
=
13 4
7
2 2
+
9 9
=
36 18
2
+
9
=
2
8
9 9
+
8 4
=
108 36
9
+
8
=
3
9
8 4
+
3 8
=
19 8
10
3 8
+
4 5
=
47 40
11
5 7
+
1 3
=
22 21
12
1 9
+
3 7
=
34 63
13
3 7
+
1 3
=
16 21
14
1 3
+
2 9
=
5 9
15
3 5
+
1 3
=
14 15