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분수: 분모가 다른 덧셈7분수3

1
7 3
+
2 7
=
55 21
2
7 2
+
3 3
=
27 6
7
+
3
=
9 2
3
3 9
+
1 7
=
30 63
3
+
1
=
10 21
4
1 7
+
7 5
=
54 35
5
1 5
+
2 3
=
13 15
6
2 3
+
7 4
=
29 12
7
4 7
+
1 4
=
23 28
8
1 4
+
8 8
=
10 8
1
+
8
=
5 4
9
8 8
+
5 6
=
44 24
8
+
5
=
11 6
10
5 6
+
6 9
=
27 18
5
+
6
=
3 2
11
9 2
+
1 4
=
19 4
12
1 6
+
6 3
=
13 6
13
9 3
+
5 7
=
78 21
9
+
5
=
26 7
14
5 7
+
8 6
=
86 42
5
+
8
=
43 21
15
8 6
+
3 5
=
58 30
8
+
3
=
29 15