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분수: 분모가 다른 덧셈4분수7

1
7 4
+
4 5
=
51 20
2
5 4
+
4 2
=
13 4
3
4 2
+
1 3
=
14 6
4
+
1
=
7 3
4
1 3
+
6 6
=
8 6
1
+
6
=
4 3
5
6 6
+
2 7
=
54 42
6
+
2
=
9 7
6
2 7
+
3 5
=
31 35
7
3 5
+
1 4
=
17 20
8
1 4
+
9 2
=
19 4
9
1 4
+
3 2
=
7 4
10
2 9
+
1 2
=
13 18
11
1 2
+
9 5
=
23 10
12
9 5
+
4 7
=
83 35
13
4 7
+
7 2
=
57 14
14
7 2
+
5 5
=
45 10
7
+
5
=
9 2
15
5 5
+
1 7
=
40 35
5
+
1
=
8 7