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분수: 분모가 다른 덧셈1분수3

1
1 3
+
2 7
=
13 21
2
2 7
+
1 3
=
13 21
3
4 6
+
1 4
=
11 12
4
1 4
+
5 5
=
25 20
1
+
5
=
5 4
5
5 7
+
1 4
=
27 28
6
3 4
+
8 8
=
14 8
3
+
8
=
7 4
7
8 8
+
3 7
=
80 56
8
+
3
=
10 7
8
3 7
+
2 6
=
32 42
3
+
2
=
16 21
9
2 6
+
7 5
=
52 30
2
+
7
=
26 15
10
1 3
+
8 5
=
29 15
11
8 5
+
4 3
=
44 15
12
4 3
+
6 2
=
26 6
4
+
6
=
13 3
13
6 2
+
2 6
=
20 6
6
+
2
=
10 3
14
2 6
+
1 5
=
16 30
2
+
1
=
8 15
15
1 5
+
7 7
=
42 35
1
+
7
=
6 5