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분수: 분모가 다른 덧셈2분수1

1
1 7
+
2 6
=
20 42
1
+
2
=
10 21
2
2 6
+
7 5
=
52 30
2
+
7
=
26 15
3
7 5
+
2 9
=
73 45
4
2 9
+
1 7
=
23 63
5
1 7
+
4 5
=
33 35
6
4 5
+
3 6
=
39 30
4
+
3
=
13 10
7
3 6
+
7 2
=
24 6
3
+
7
=
4
8
7 2
+
4 5
=
43 10
9
5 4
+
2 7
=
43 28
10
2 7
+
1 2
=
11 14
11
1 2
+
3 4
=
5 4
12
4 3
+
9 5
=
47 15
13
9 5
+
4 3
=
47 15
14
4 3
+
1 2
=
11 6
15
1 2
+
2 8
=
6 8
1
+
2
=
3 4