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분수: 분모가 다른 덧셈4분수3

1
9 3
+
3 9
=
30 9
9
+
3
=
10 3
2
3 9
+
4 3
=
15 9
3
+
4
=
5 3
3
3 4
+
6 3
=
33 12
3
+
6
=
11 4
4
6 3
+
7 4
=
45 12
6
+
7
=
15 4
5
7 4
+
3 7
=
61 28
6
7 3
+
2 7
=
55 21
7
2 7
+
1 8
=
23 56
8
8 7
+
1 2
=
23 14
9
1 2
+
8 3
=
19 6
10
8 3
+
4 4
=
44 12
8
+
4
=
11 3
11
4 4
+
2 8
=
10 8
4
+
2
=
5 4
12
8 2
+
1 6
=
25 6
13
1 9
+
4 8
=
44 72
1
+
4
=
11 18
14
4 8
+
2 3
=
28 24
4
+
2
=
7 6
15
2 3
+
6 5
=
28 15