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분수: 분모가 다른 덧셈4분수7

1
4 7
+
2 4
=
30 28
4
+
2
=
15 14
2
2 4
+
9 3
=
42 12
2
+
9
=
7 2
3
9 3
+
4 7
=
75 21
9
+
4
=
25 7
4
2 7
+
8 4
=
64 28
2
+
8
=
16 7
5
8 4
+
4 2
=
16 4
8
+
4
=
4
6
4 2
+
7 6
=
19 6
7
7 6
+
2 2
=
13 6
8
2 2
+
9 4
=
13 4
9
1 4
+
5 5
=
25 20
1
+
5
=
5 4
10
5 5
+
7 7
=
70 35
5
+
7
=
2
11
7 4
+
1 8
=
15 8
12
1 8
+
5 4
=
11 8
13
4 5
+
8 8
=
72 40
4
+
8
=
9 5
14
8 8
+
1 3
=
32 24
8
+
1
=
4 3
15
1 3
+
3 5
=
14 15