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분수: 분모가 다른 덧셈2분수3

1
3 6
+
1 4
=
9 12
3
+
1
=
3 4
2
4 4
+
5 5
=
40 20
4
+
5
=
2
3
5 5
+
4 6
=
50 30
5
+
4
=
5 3
4
4 6
+
7 4
=
29 12
5
7 4
+
3 5
=
47 20
6
7 5
+
4 6
=
62 30
7
+
4
=
31 15
7
4 6
+
6 2
=
22 6
4
+
6
=
11 3
8
2 5
+
1 4
=
13 20
9
1 4
+
5 3
=
23 12
10
5 3
+
1 7
=
38 21
11
5 2
+
7 8
=
27 8
12
7 8
+
1 4
=
9 8
13
1 4
+
2 5
=
13 20
14
2 5
+
4 6
=
32 30
2
+
4
=
16 15
15
4 6
+
1 7
=
34 42
4
+
1
=
17 21