分子が1になる約分
8 4
48 36
7 6
21 30
7 2
63 12
4 2
20 4
4 9
8 81
8 3
32 9
4 2
20 14
8 9
72 81
5 5
10 15
5 8
35 48
5 7
45 63
8 3
56 12
3 6
18 54
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所要時間: 分 秒 198/385
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