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분수: 분모가 다른 덧셈5분수7

1
7 5
+
2 8
=
66 40
7
+
2
=
33 20
2
8 4
+
1 3
=
28 12
8
+
1
=
7 3
3
1 3
+
9 6
=
11 6
4
9 6
+
1 4
=
21 12
9
+
1
=
7 4
5
1 4
+
7 5
=
33 20
6
7 5
+
3 3
=
36 15
7
+
3
=
12 5
7
3 3
+
1 5
=
18 15
3
+
1
=
6 5
8
1 5
+
7 4
=
39 20
9
7 4
+
5 3
=
41 12
10
4 5
+
5 6
=
49 30
11
5 6
+
8 2
=
29 6
12
2 6
+
1 3
=
4 6
2
+
1
=
2 3
13
2 3
+
6 4
=
26 12
2
+
6
=
13 6
14
6 4
+
3 8
=
15 8
15
3 8
+
5 9
=
67 72