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분수: 분모가 다른 덧셈2분수7

1
2 7
+
3 3
=
27 21
2
+
3
=
9 7
2
3 3
+
7 7
=
42 21
3
+
7
=
2
3
7 7
+
1 6
=
49 42
7
+
1
=
7 6
4
4 6
+
3 2
=
13 6
5
3 2
+
5 8
=
17 8
6
8 5
+
5 3
=
49 15
7
3 4
+
1 5
=
19 20
8
1 5
+
4 7
=
27 35
9
7 6
+
1 3
=
9 6
7
+
1
=
3 2
10
1 3
+
2 4
=
10 12
1
+
2
=
5 6
11
2 4
+
7 2
=
16 4
2
+
7
=
4
12
7 2
+
4 4
=
18 4
7
+
4
=
9 2
13
4 4
+
2 9
=
44 36
4
+
2
=
11 9
14
9 2
+
3 3
=
33 6
9
+
3
=
11 2
15
3 3
+
5 8
=
39 24
3
+
5
=
13 8