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분수 2자리 (분모가 같은)

1
35 45
+
10 45
=
45 45
35
+
10
=
1 1
2
10 21
+
15 21
=
25 21
3
15 29
+
55 29
=
70 29
4
55 80
+
63 80
=
118 80
55
+
63
=
59 40
5
63 38
+
42 38
=
105 38
6
42 31
+
39 31
=
81 31
7
39 13
+
56 13
=
95 13
8
56 21
+
62 21
=
118 21
9
62 68
+
45 68
=
107 68
10
45 72
+
81 72
=
126 72
45
+
81
=
7 4
11
81 21
+
23 21
=
104 21
12
23 11
+
24 11
=
47 11
13
24 30
+
12 30
=
36 30
24
+
12
=
6 5
14
12 28
+
64 28
=
76 28
12
+
64
=
19 7
15
64 81
+
17 81
=
81 81
64
+
17
=
1 1