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