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분수: 분모가 다른 덧셈7분수2

1
2 8
+
1 5
=
18 40
2
+
1
=
9 20
2
1 5
+
7 2
=
37 10
3
7 2
+
9 5
=
53 10
4
9 5
+
5 3
=
52 15
5
5 3
+
2 4
=
26 12
5
+
2
=
13 6
6
2 4
+
3 8
=
7 8
7
3 8
+
9 5
=
87 40
8
9 5
+
8 3
=
67 15
9
8 3
+
3 5
=
49 15
10
3 5
+
1 2
=
11 10
11
2 2
+
1 4
=
5 4
12
1 4
+
3 5
=
17 20
13
3 5
+
5 9
=
52 45
14
5 9
+
6 2
=
64 18
5
+
6
=
32 9
15
6 2
+
3 6
=
21 6
6
+
3
=
7 2