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분수: 분모가 다른 덧셈4분수7

1
4 7
+
9 4
=
79 28
2
9 4
+
4 7
=
79 28
3
4 7
+
2 3
=
26 21
4
2 3
+
3 9
=
9 9
2
+
3
=
1
5
9 7
+
1 3
=
34 21
6
1 3
+
4 6
=
6 6
1
+
4
=
1
7
4 6
+
1 2
=
7 6
8
2 4
+
1 5
=
14 20
2
+
1
=
7 10
9
1 5
+
2 4
=
14 20
1
+
2
=
7 10
10
2 4
+
6 8
=
10 8
2
+
6
=
5 4
11
1 7
+
8 2
=
58 14
1
+
8
=
29 7
12
2 6
+
1 5
=
16 30
2
+
1
=
8 15
13
1 4
+
9 8
=
11 8
14
9 8
+
5 9
=
121 72
15
9 6
+
1 5
=
51 30
9
+
1
=
17 10