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분수 2자리 (분모가 같은)

1
3 90
+
2 90
=
5 90
3
+
2
=
1 18
2
2 54
+
1 54
=
3 54
2
+
1
=
1 18
3
4 11
+
5 11
=
9 11
4
5 27
+
8 27
=
13 27
5
8 44
+
3 44
=
11 44
8
+
3
=
1 4
6
3 76
+
1 76
=
4 76
3
+
1
=
1 19
7
1 43
+
3 43
=
4 43
8
3 83
+
5 83
=
8 83
9
5 44
+
7 44
=
12 44
5
+
7
=
3 11
10
7 35
+
6 35
=
13 35
11
6 12
+
5 12
=
11 12
12
5 70
+
4 70
=
9 70
13
4 25
+
2 25
=
6 25
14
2 75
+
5 75
=
7 75
15
5 74
+
3 74
=
8 74
5
+
3
=
4 37