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분수: 분모가 다른 덧셈2분수8

1
2 8
+
7 5
=
66 40
2
+
7
=
33 20
2
7 5
+
3 3
=
36 15
7
+
3
=
12 5
3
5 3
+
1 2
=
13 6
4
1 6
+
8 5
=
53 30
5
8 5
+
1 4
=
37 20
6
1 4
+
3 3
=
15 12
1
+
3
=
5 4
7
3 3
+
4 9
=
13 9
8
4 9
+
7 2
=
71 18
9
9 2
+
2 7
=
67 14
10
2 7
+
9 3
=
69 21
2
+
9
=
23 7
11
3 9
+
5 5
=
60 45
3
+
5
=
4 3
12
1 3
+
2 7
=
13 21
13
7 4
+
1 3
=
25 12
14
1 3
+
4 5
=
17 15
15
1 2
+
2 3
=
7 6