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