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분수: 분모가 다른 덧셈3분수7

1
3 7
+
4 4
=
40 28
3
+
4
=
10 7
2
4 4
+
3 3
=
24 12
4
+
3
=
2
3
3 3
+
4 5
=
27 15
3
+
4
=
9 5
4
4 5
+
6 9
=
66 45
4
+
6
=
22 15
5
1 2
+
4 9
=
17 18
6
4 9
+
1 2
=
17 18
7
1 2
+
7 8
=
11 8
8
7 8
+
5 7
=
89 56
9
7 8
+
1 5
=
43 40
10
1 5
+
3 4
=
19 20
11
4 9
+
1 4
=
25 36
12
1 4
+
4 9
=
25 36
13
4 9
+
9 3
=
31 9
14
3 3
+
9 2
=
33 6
3
+
9
=
11 2
15
9 2
+
2 8
=
38 8
9
+
2
=
19 4