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분수: 분모가 다른 덧셈1분수3

1
3 3
+
1 5
=
18 15
3
+
1
=
6 5
2
1 5
+
2 2
=
12 10
1
+
2
=
6 5
3
4 3
+
3 4
=
25 12
4
4 4
+
1 3
=
16 12
4
+
1
=
4 3
5
1 4
+
2 6
=
7 12
6
2 6
+
1 2
=
5 6
7
2 5
+
1 7
=
19 35
8
1 7
+
6 2
=
44 14
1
+
6
=
22 7
9
6 2
+
5 6
=
23 6
10
5 7
+
1 3
=
22 21
11
1 3
+
4 9
=
7 9
12
4 9
+
7 2
=
71 18
13
2 5
+
1 2
=
9 10
14
1 2
+
3 5
=
11 10
15
3 5
+
7 4
=
47 20