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분수: 분모가 다른 덧셈2분수3

1
2 3
+
9 7
=
41 21
2
7 9
+
5 5
=
80 45
7
+
5
=
16 9
3
5 5
+
2 3
=
25 15
5
+
2
=
5 3
4
2 3
+
7 5
=
31 15
5
7 5
+
3 6
=
57 30
7
+
3
=
19 10
6
3 6
+
4 3
=
11 6
7
3 4
+
4 2
=
11 4
8
4 2
+
3 8
=
19 8
9
3 8
+
4 3
=
41 24
10
3 4
+
4 2
=
11 4
11
4 2
+
5 8
=
21 8
12
8 7
+
1 2
=
23 14
13
1 2
+
4 3
=
11 6
14
4 3
+
8 7
=
52 21
15
8 7
+
1 2
=
23 14