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분수: 분모가 다른 덧셈3분수2

1
2 2
+
8 6
=
14 6
2
+
8
=
7 3
2
8 6
+
4 7
=
80 42
8
+
4
=
40 21
3
4 7
+
3 4
=
37 28
4
3 4
+
9 3
=
45 12
3
+
9
=
15 4
5
9 3
+
4 2
=
30 6
9
+
4
=
5
6
4 2
+
3 4
=
11 4
7
4 5
+
1 3
=
17 15
8
1 3
+
3 2
=
11 6
9
3 2
+
9 3
=
27 6
3
+
9
=
9 2
10
3 2
+
1 3
=
11 6
11
1 3
+
8 5
=
29 15
12
8 5
+
6 4
=
62 20
8
+
6
=
31 10
13
1 2
+
5 8
=
9 8
14
5 8
+
4 9
=
77 72
15
4 9
+
6 2
=
62 18
4
+
6
=
31 9