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분수: 분모가 다른 덧셈4분수1

1
1 7
+
3 3
=
24 21
1
+
3
=
8 7
2
3 3
+
5 5
=
30 15
3
+
5
=
2
3
5 5
+
2 2
=
20 10
5
+
2
=
2
4
2 2
+
8 9
=
34 18
2
+
8
=
17 9
5
8 9
+
1 3
=
11 9
6
3 7
+
1 8
=
31 56
7
4 2
+
2 9
=
40 18
4
+
2
=
20 9
8
5 9
+
1 5
=
34 45
9
1 5
+
7 3
=
38 15
10
7 3
+
5 6
=
19 6
11
5 6
+
6 5
=
61 30
12
6 5
+
8 4
=
64 20
6
+
8
=
16 5
13
8 4
+
5 8
=
21 8
14
5 8
+
2 3
=
31 24
15
2 3
+
1 9
=
7 9