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분수: 분모가 다른 덧셈1분수3

1
3 3
+
1 4
=
15 12
3
+
1
=
5 4
2
1 4
+
3 7
=
19 28
3
3 7
+
7 4
=
61 28
4
7 4
+
3 6
=
27 12
7
+
3
=
9 4
5
3 6
+
6 2
=
21 6
3
+
6
=
7 2
6
6 2
+
2 6
=
20 6
6
+
2
=
10 3
7
1 9
+
5 5
=
50 45
1
+
5
=
10 9
8
5 5
+
4 4
=
40 20
5
+
4
=
2
9
4 4
+
1 9
=
40 36
4
+
1
=
10 9
10
1 9
+
4 3
=
13 9
11
3 4
+
1 2
=
5 4
12
1 8
+
5 7
=
47 56
13
5 7
+
7 3
=
64 21
14
7 3
+
4 6
=
18 6
7
+
4
=
3
15
6 4
+
4 7
=
58 28
6
+
4
=
29 14