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분수: 분모가 다른 덧셈2분수7

1
2 7
+
4 4
=
36 28
2
+
4
=
9 7
2
4 4
+
2 3
=
20 12
4
+
2
=
5 3
3
2 3
+
1 5
=
13 15
4
1 5
+
8 8
=
48 40
1
+
8
=
6 5
5
5 8
+
4 2
=
21 8
6
4 2
+
6 3
=
24 6
4
+
6
=
4
7
6 3
+
5 7
=
57 21
6
+
5
=
19 7
8
5 7
+
1 4
=
27 28
9
1 5
+
9 7
=
52 35
10
9 7
+
3 6
=
75 42
9
+
3
=
25 14
11
3 6
+
2 5
=
27 30
3
+
2
=
9 10
12
5 5
+
1 8
=
45 40
5
+
1
=
9 8
13
1 8
+
5 9
=
49 72
14
5 9
+
2 4
=
38 36
5
+
2
=
19 18
15
2 4
+
3 2
=
8 4
2
+
3
=
2