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