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분수: 분모가 다른 덧셈2분수3

1
2 5
+
1 8
=
21 40
2
1 8
+
2 5
=
21 40
3
2 5
+
7 8
=
51 40
4
8 3
+
1 7
=
59 21
5
1 7
+
2 3
=
17 21
6
3 2
+
2 5
=
19 10
7
6 5
+
5 9
=
79 45
8
5 9
+
2 8
=
58 72
5
+
2
=
29 36
9
2 8
+
4 2
=
18 8
2
+
4
=
9 4
10
2 4
+
8 3
=
38 12
2
+
8
=
19 6
11
8 3
+
3 6
=
19 6
12
6 4
+
1 6
=
20 12
6
+
1
=
5 3
13
1 2
+
5 6
=
8 6
1
+
5
=
4 3
14
5 6
+
3 7
=
53 42
15
3 7
+
1 4
=
19 28