算願:比を簡単にしよう1 なまえ . 15 : 10 =
4 : 8 = 9 : 6 = 4 : 8 = 6 : 9 = 16 : 20 = 10 : 5 = 20 : 8 = 10 : 2 = 6 : 12 = 20 : 4 = 6 : 4 = 12 : 15 = 16 : 8 = 2 : 4 = 3 : 6 = 4 : 16 = 25 : 10 = 2 : 6 = 15 : 12 = 20 : 8 = 15 : 6 = 16 : 12 = 6 : 2 = 3 : 12 =
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