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분수 2자리 (분모가 같은)

1
1 30
+
2 30
=
3 30
1
+
2
=
1 10
2
2 28
+
6 28
=
8 28
2
+
6
=
2 7
3
6 15
+
3 15
=
9 15
6
+
3
=
3 5
4
2 63
+
1 63
=
3 63
2
+
1
=
1 21
5
1 25
+
6 25
=
7 25
6
6 10
+
5 10
=
11 10
7
5 41
+
2 41
=
7 41
8
2 21
+
6 21
=
8 21
9
6 31
+
1 31
=
7 31
10
1 42
+
8 42
=
9 42
1
+
8
=
3 14
11
8 83
+
9 83
=
17 83
12
9 54
+
8 54
=
17 54
13
8 23
+
2 23
=
10 23
14
4 92
+
2 92
=
6 92
4
+
2
=
3 46
15
2 60
+
5 60
=
7 60