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분수: 분모가 다른 덧셈2분수7

1
2 7
+
5 5
=
45 35
2
+
5
=
9 7
2
1 5
+
9 7
=
52 35
3
9 7
+
3 9
=
102 63
9
+
3
=
34 21
4
3 9
+
7 4
=
75 36
3
+
7
=
25 12
5
7 4
+
8 3
=
53 12
6
8 3
+
3 9
=
27 9
8
+
3
=
3
7
3 9
+
4 8
=
60 72
3
+
4
=
5 6
8
4 8
+
5 4
=
14 8
4
+
5
=
7 4
9
4 8
+
1 9
=
44 72
4
+
1
=
11 18
10
1 9
+
8 5
=
77 45
11
8 5
+
3 8
=
79 40
12
1 8
+
3 2
=
13 8
13
3 2
+
5 3
=
19 6
14
3 5
+
1 4
=
17 20
15
1 4
+
4 7
=
23 28